Mozilla

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net and www.thunderbolt.io. The opportunity Thunderbolt is an open-source, cross-platform AI product initiative from the team behind Thunderbird. It is being built around a clear principle: people and organizations should be able to use AI while staying in control of their data, infrastructure, model choices, and long-term options. Thunderbolt is designed to support flexible deployment models, integrations with AI tools and workflows, and use cases across desktop, web, and mobile. We’re looking for a Staff Product Engineer to help build Thunderbolt as it moves from early product development into enterprise use cases. This role sits at the intersection of full-stack product engineering, AI-enabled product development, enterprise workflows, technical execution, product judgment, and post-launch iteration. You’ll work across the stack to turn product direction, user needs, partner feedback, and enterprise requirements into complete product features for AI-powered chat, search, research, workflow automation, administration, integrations, and enterprise workflows. This is not a role focused only on implementing tickets. You’ll own product work from concept through launch, adoption, and iteration, helping the team understand whether features are usable, reliable, being used, and creating value. You should be comfortable operating independently in ambiguity, working across front-end, back-end, APIs, integrations, and infrastructure-adjacent areas, and making thoughtful tradeoffs between speed, usability, maintainability, reliability, and enterprise needs. Strong candidates will be able to turn ambiguous product ideas and technical direction into shipped product experiences, reusable product and engineering patterns, and practical improvements that help Thunderbolt scale as both an open-source product and an enterprise-ready platform. What you’ll do - Own the implementation of Thunderbolt product features from concept through launch, adoption, and iteration. - Translate product vision, user needs, partner feedback, and enterprise requirements into practical technical plans and shipped product experiences. - Work across the stack to build, integrate, test, and ship complete product features. - Build features for AI-powered chat, search, research, workflow automation, administration, integrations, and enterprise workflows. - Partner closely with product, design, engineering, enterprise-facing teams, and open-source contributors to clarify requirements and deliver high-quality outcomes. - Collaborate with senior technical leadership to turn product-shaping technical direction into executable product work. - Use AI-assisted development tools thoughtfully to accelerate implementation while maintaining strong judgment around quality, security, maintainability, and reliability. - Make thoughtful technical and product tradeoffs in ambiguous situations, balancing speed, usability, maintainability, reliability, and enterprise needs. - Follow through after launch by reviewing usage, qualitative feedback, support signals, quality issues, and adoption patterns. - Instrument features or collaborate on measurement approaches that help the team understand adoption, reliability, and product value. - Identify product gaps, technical risks, edge cases, and opportunities to improve the user experience. - Write clear, maintainable, well-tested code across front-end, back-end, APIs, integrations, and infrastructure-adjacent areas. - Help establish reusable product and engineering patterns that allow future features to be built more efficiently. - Contribute to a product engineering culture grounded in ownership, quality, experimentation, user value, and practical execution. What you bring - 10+ years of professional software engineering experience, including significant experience building and shipping production applications with Staff-level scope, leadership, and impact. - Strong full-stack engineering skills, with the ability to work across user interfaces, APIs, services, integrations, data flows, and infrastructure-adjacent areas. - Demonstrated experience owning complex product features from technical planning through implementation, launch, evaluation, and iteration. - Experience building AI-enabled products or features, with practical familiarity in LLMs, RAG, agents, model/provider abstraction, data connectors, retrieval systems, or AI application architecture. - Practical experience evaluating and using multiple AI tools, models, frameworks, or development harnesses, with the ability to explain tradeoffs, limitations, and preferred tooling choices. - Experience working with open-source enterprise products, developer tools, infrastructure products, platform products, or technically complex enterprise software. - Strong product judgment, including the ability to translate product direction, user feedback, partner input, customer needs, and product signals into practical technical plans and follow-up iterations. - Comfort operating independently in a fast-changing product environment where product direction, technical architecture, and enterprise requirements are still being defined. - Strong understanding of software quality, testing, maintainability, security, performance, reliability, and implementation tradeoffs. - Strong collaboration and communication skills across engineering, product, design, open-source, and customer- or partner-facing stakeholders. - Awareness of enterprise software needs, including privacy, security, administration, access control, compliance, deployment flexibility, supportability, and responsible AI considerations. Bonus points for - Experience with self-hosted, hybrid, customer-controlled, or regulated deployment environments. - Familiarity with regulatory or compliance considerations affecting AI and enterprise software, such as the EU AI Act, Cyber Resilience Act, GDPR, HIPAA, SOC 2, or similar frameworks. - Experience working with enterprise customers, public sector organizations, systems integrators, technical partners, or customer-facing engineering teams. - Experience contributing to reusable product patterns, component libraries, technical frameworks, or shared engineering practices. - Experience with instrumentation, observability, experimentation, or other approaches to understanding product adoption, reliability, and value. What success looks like In this role, success means helping Thunderbolt turn ambiguous product ideas, technical direction, user needs, and enterprise requirements into complete product capabilities that are usable, reliable, maintainable, and valuable. You will help the team move quickly while also building the patterns, feedback loops, and product quality needed for Thunderbolt to scale as both an open-source product and an enterprise-ready platform. Over time, successful work in this role will lead to: - Shipped features that solve real user, partner, and enterprise needs. - Stronger full-stack product capabilities across AI-powered chat, search, research, workflow automation, administration, integrations, and enterprise workflows. - Clearer technical plans that translate product direction and enterprise requirements into executable work. - Better post-launch understanding of whether features are being used, working as intended, and creating value. - More reusable product and engineering patterns that help future features move faster. - Fewer product gaps, edge cases, and technical risks discovered late in development. - Stronger alignment between product, design, engineering, enterprise-facing teams, and open-source contributors. - Greater confidence that Thunderbolt features are secure, maintainable, supportable, and ready for enterprise use. Work environment You’ll work with our passionate staff and open-source community members from all over the globe to support the mission and objectives of MZLA Technologies Corporation. In this role, you’ll also collaborate closely with engineering, product, design, enterprise-facing teams, contractors, and external contributors working on Thunderbolt. This is a remote, full-time position. Strong communication and documentation skills are essential for effective collaboration across time zones and disciplines. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - US: $185,000 - $220,000 USD We may consider candidates with strong skills but less than the required experience. Title, level and compensation will be determined based on qualifications and experience. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - 401(k) contributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation. LI-DNI

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net and www.thunderbolt.io. The opportunity Thunderbolt is an open-source, cross-platform AI product initiative from the team behind Thunderbird. It is being built around a clear principle: people and organizations should be able to use AI while staying in control of their data, infrastructure, model choices, and long-term options. Thunderbolt is designed to support flexible deployment models, integrations with AI tools and workflows, and use cases across desktop, web, and mobile. We’re looking for a Staff Product Engineer to help build Thunderbolt as it moves from early product development into enterprise use cases. This role sits at the intersection of full-stack product engineering, AI-enabled product development, enterprise workflows, technical execution, product judgment, and post-launch iteration. You’ll work across the stack to turn product direction, user needs, partner feedback, and enterprise requirements into complete product features for AI-powered chat, search, research, workflow automation, administration, integrations, and enterprise workflows. This is not a role focused only on implementing tickets. You’ll own product work from concept through launch, adoption, and iteration, helping the team understand whether features are usable, reliable, being used, and creating value. You should be comfortable operating independently in ambiguity, working across front-end, back-end, APIs, integrations, and infrastructure-adjacent areas, and making thoughtful tradeoffs between speed, usability, maintainability, reliability, and enterprise needs. Strong candidates will be able to turn ambiguous product ideas and technical direction into shipped product experiences, reusable product and engineering patterns, and practical improvements that help Thunderbolt scale as both an open-source product and an enterprise-ready platform. What you’ll do - Own the implementation of Thunderbolt product features from concept through launch, adoption, and iteration. - Translate product vision, user needs, partner feedback, and enterprise requirements into practical technical plans and shipped product experiences. - Work across the stack to build, integrate, test, and ship complete product features. - Build features for AI-powered chat, search, research, workflow automation, administration, integrations, and enterprise workflows. - Partner closely with product, design, engineering, enterprise-facing teams, and open-source contributors to clarify requirements and deliver high-quality outcomes. - Collaborate with senior technical leadership to turn product-shaping technical direction into executable product work. - Use AI-assisted development tools thoughtfully to accelerate implementation while maintaining strong judgment around quality, security, maintainability, and reliability. - Make thoughtful technical and product tradeoffs in ambiguous situations, balancing speed, usability, maintainability, reliability, and enterprise needs. - Follow through after launch by reviewing usage, qualitative feedback, support signals, quality issues, and adoption patterns. - Instrument features or collaborate on measurement approaches that help the team understand adoption, reliability, and product value. - Identify product gaps, technical risks, edge cases, and opportunities to improve the user experience. - Write clear, maintainable, well-tested code across front-end, back-end, APIs, integrations, and infrastructure-adjacent areas. - Help establish reusable product and engineering patterns that allow future features to be built more efficiently. - Contribute to a product engineering culture grounded in ownership, quality, experimentation, user value, and practical execution. What you bring - 10+ years of professional software engineering experience, including significant experience building and shipping production applications with Staff-level scope, leadership, and impact. - Strong full-stack engineering skills, with the ability to work across user interfaces, APIs, services, integrations, data flows, and infrastructure-adjacent areas. - Demonstrated experience owning complex product features from technical planning through implementation, launch, evaluation, and iteration. - Experience building AI-enabled products or features, with practical familiarity in LLMs, RAG, agents, model/provider abstraction, data connectors, retrieval systems, or AI application architecture. - Practical experience evaluating and using multiple AI tools, models, frameworks, or development harnesses, with the ability to explain tradeoffs, limitations, and preferred tooling choices. - Experience working with open-source enterprise products, developer tools, infrastructure products, platform products, or technically complex enterprise software. - Strong product judgment, including the ability to translate product direction, user feedback, partner input, customer needs, and product signals into practical technical plans and follow-up iterations. - Comfort operating independently in a fast-changing product environment where product direction, technical architecture, and enterprise requirements are still being defined. - Strong understanding of software quality, testing, maintainability, security, performance, reliability, and implementation tradeoffs. - Strong collaboration and communication skills across engineering, product, design, open-source, and customer- or partner-facing stakeholders. - Awareness of enterprise software needs, including privacy, security, administration, access control, compliance, deployment flexibility, supportability, and responsible AI considerations. Bonus points for - Experience with self-hosted, hybrid, customer-controlled, or regulated deployment environments. - Familiarity with regulatory or compliance considerations affecting AI and enterprise software, such as the EU AI Act, Cyber Resilience Act, GDPR, HIPAA, SOC 2, or similar frameworks. - Experience working with enterprise customers, public sector organizations, systems integrators, technical partners, or customer-facing engineering teams. - Experience contributing to reusable product patterns, component libraries, technical frameworks, or shared engineering practices. - Experience with instrumentation, observability, experimentation, or other approaches to understanding product adoption, reliability, and value. What success looks like In this role, success means helping Thunderbolt turn ambiguous product ideas, technical direction, user needs, and enterprise requirements into complete product capabilities that are usable, reliable, maintainable, and valuable. You will help the team move quickly while also building the patterns, feedback loops, and product quality needed for Thunderbolt to scale as both an open-source product and an enterprise-ready platform. Over time, successful work in this role will lead to: - Shipped features that solve real user, partner, and enterprise needs. - Stronger full-stack product capabilities across AI-powered chat, search, research, workflow automation, administration, integrations, and enterprise workflows. - Clearer technical plans that translate product direction and enterprise requirements into executable work. - Better post-launch understanding of whether features are being used, working as intended, and creating value. - More reusable product and engineering patterns that help future features move faster. - Fewer product gaps, edge cases, and technical risks discovered late in development. - Stronger alignment between product, design, engineering, enterprise-facing teams, and open-source contributors. - Greater confidence that Thunderbolt features are secure, maintainable, supportable, and ready for enterprise use. Work environment You’ll work with our passionate staff and open-source community members from all over the globe to support the mission and objectives of MZLA Technologies Corporation. In this role, you’ll also collaborate closely with engineering, product, design, enterprise-facing teams, contractors, and external contributors working on Thunderbolt. This is a remote, full-time position. Strong communication and documentation skills are essential for effective collaboration across time zones and disciplines. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - Canada: $155,000 - $185,000 CAD We may consider candidates with strong skills but less than the required experience. Title, level and compensation will be determined based on qualifications and experience. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - RRSP contributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation. LI-DNI

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net and www.thunderbolt.io. The opportunity Thunderbolt is an open-source, cross-platform AI product initiative from the team behind Thunderbird. It is being built around a clear principle: people and organizations should be able to use AI while staying in control of their data, infrastructure, model choices, and long-term options. Thunderbolt is designed to support flexible deployment models, integrations with AI tools and workflows, and use cases across desktop, web, and mobile. We’re looking for a Staff Product Engineer to help build Thunderbolt as it moves from early product development into enterprise use cases. This role sits at the intersection of full-stack product engineering, AI-enabled product development, enterprise workflows, technical execution, product judgment, and post-launch iteration. You’ll work across the stack to turn product direction, user needs, partner feedback, and enterprise requirements into complete product features for AI-powered chat, search, research, workflow automation, administration, integrations, and enterprise workflows. This is not a role focused only on implementing tickets. You’ll own product work from concept through launch, adoption, and iteration, helping the team understand whether features are usable, reliable, being used, and creating value. You should be comfortable operating independently in ambiguity, working across front-end, back-end, APIs, integrations, and infrastructure-adjacent areas, and making thoughtful tradeoffs between speed, usability, maintainability, reliability, and enterprise needs. Strong candidates will be able to turn ambiguous product ideas and technical direction into shipped product experiences, reusable product and engineering patterns, and practical improvements that help Thunderbolt scale as both an open-source product and an enterprise-ready platform. What you’ll do - Own the implementation of Thunderbolt product features from concept through launch, adoption, and iteration. - Translate product vision, user needs, partner feedback, and enterprise requirements into practical technical plans and shipped product experiences. - Work across the stack to build, integrate, test, and ship complete product features. - Build features for AI-powered chat, search, research, workflow automation, administration, integrations, and enterprise workflows. - Partner closely with product, design, engineering, enterprise-facing teams, and open-source contributors to clarify requirements and deliver high-quality outcomes. - Collaborate with senior technical leadership to turn product-shaping technical direction into executable product work. - Use AI-assisted development tools thoughtfully to accelerate implementation while maintaining strong judgment around quality, security, maintainability, and reliability. - Make thoughtful technical and product tradeoffs in ambiguous situations, balancing speed, usability, maintainability, reliability, and enterprise needs. - Follow through after launch by reviewing usage, qualitative feedback, support signals, quality issues, and adoption patterns. - Instrument features or collaborate on measurement approaches that help the team understand adoption, reliability, and product value. - Identify product gaps, technical risks, edge cases, and opportunities to improve the user experience. - Write clear, maintainable, well-tested code across front-end, back-end, APIs, integrations, and infrastructure-adjacent areas. - Help establish reusable product and engineering patterns that allow future features to be built more efficiently. - Contribute to a product engineering culture grounded in ownership, quality, experimentation, user value, and practical execution. What you bring - 10+ years of professional software engineering experience, including significant experience building and shipping production applications with Staff-level scope, leadership, and impact. - Strong full-stack engineering skills, with the ability to work across user interfaces, APIs, services, integrations, data flows, and infrastructure-adjacent areas. - Demonstrated experience owning complex product features from technical planning through implementation, launch, evaluation, and iteration. - Experience building AI-enabled products or features, with practical familiarity in LLMs, RAG, agents, model/provider abstraction, data connectors, retrieval systems, or AI application architecture. - Practical experience evaluating and using multiple AI tools, models, frameworks, or development harnesses, with the ability to explain tradeoffs, limitations, and preferred tooling choices. - Experience working with open-source enterprise products, developer tools, infrastructure products, platform products, or technically complex enterprise software. - Strong product judgment, including the ability to translate product direction, user feedback, partner input, customer needs, and product signals into practical technical plans and follow-up iterations. - Comfort operating independently in a fast-changing product environment where product direction, technical architecture, and enterprise requirements are still being defined. - Strong understanding of software quality, testing, maintainability, security, performance, reliability, and implementation tradeoffs. - Strong collaboration and communication skills across engineering, product, design, open-source, and customer- or partner-facing stakeholders. - Awareness of enterprise software needs, including privacy, security, administration, access control, compliance, deployment flexibility, supportability, and responsible AI considerations. Bonus points for - Experience with self-hosted, hybrid, customer-controlled, or regulated deployment environments. - Familiarity with regulatory or compliance considerations affecting AI and enterprise software, such as the EU AI Act, Cyber Resilience Act, GDPR, HIPAA, SOC 2, or similar frameworks. - Experience working with enterprise customers, public sector organizations, systems integrators, technical partners, or customer-facing engineering teams. - Experience contributing to reusable product patterns, component libraries, technical frameworks, or shared engineering practices. - Experience with instrumentation, observability, experimentation, or other approaches to understanding product adoption, reliability, and value. What success looks like In this role, success means helping Thunderbolt turn ambiguous product ideas, technical direction, user needs, and enterprise requirements into complete product capabilities that are usable, reliable, maintainable, and valuable. You will help the team move quickly while also building the patterns, feedback loops, and product quality needed for Thunderbolt to scale as both an open-source product and an enterprise-ready platform. Over time, successful work in this role will lead to: - Shipped features that solve real user, partner, and enterprise needs. - Stronger full-stack product capabilities across AI-powered chat, search, research, workflow automation, administration, integrations, and enterprise workflows. - Clearer technical plans that translate product direction and enterprise requirements into executable work. - Better post-launch understanding of whether features are being used, working as intended, and creating value. - More reusable product and engineering patterns that help future features move faster. - Fewer product gaps, edge cases, and technical risks discovered late in development. - Stronger alignment between product, design, engineering, enterprise-facing teams, and open-source contributors. - Greater confidence that Thunderbolt features are secure, maintainable, supportable, and ready for enterprise use. Work environment You’ll work with our passionate staff and open-source community members from all over the globe to support the mission and objectives of MZLA Technologies Corporation. In this role, you’ll also collaborate closely with engineering, product, design, enterprise-facing teams, contractors, and external contributors working on Thunderbolt. This is a remote, full-time position. Strong communication and documentation skills are essential for effective collaboration across time zones and disciplines. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - Canada: $155,000 - $185,000 CAD - US: $185,000 - $220,000 USD We may consider candidates with strong skills but less than the required experience. Title, level and compensation will be determined based on qualifications and experience. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - 401(k) / RRSP contributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation. LI-DNI

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser, and Pocket, a service for keeping up with the best content online. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders - only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: We’re looking for a hands-on Mobile Product Manager with a primary focus on Firefox for iOS, while also contributing across mobile (including Android). This role is about building a better browser, turning downloads into loyal users, and creating experiences that truly stand out. If you’ve shipped mobile apps, obsess over details that improve everyday use, and love turning user insights into real improvements, this is a great opportunity to drive impact at Firefox. What you’ll do: - Build a fundamentally better browser experience: fix bugs, refine UI and navigation, improve downloads, menus, performance, and all the small details that make Firefox noticeably better for users who care about privacy, quality and reliability. - Drive strong activation and retention: focus on the new-user journey, quickly hooking people after they install the app, understanding where they drop off, and relentlessly optimizing the funnel through data, testing and iteration. - Deliver differentiating features and experiences that make Firefox stickier for key user groups, the kinds of things others can’t or won’t build. - Work closely with engineers, designers, data science and TPMs to ship high-impact improvements while balancing user needs, technical constraints, privacy and performance goals. - Stay deeply connected to real users: track App Store trends and discussions, test apps hands-on, analyze reviews and analytics, and turn those insights into concrete enhancements for Firefox on iOS and Android. - Monitor app health in App Store Connect and Google Play Console (crashes, ANRs, ratings) and support acquisition/retention efforts through ASO, store listings and growth experiments. - Adapt and optimize Firefox for global markets (Europe, Japan, Asia etc.), keeping cultural differences and local realities like data constraints in mind. What you'll bring: - Proven Shipping Experience: Hands-on experience launching or managing apps on the iOS App Store and/or Google Play Store, with clear impact on user experience and metrics. - Execution Focus: A strong track record of delivering features and improvements under deadlines through effective collaboration with engineering, design and cross-functional partners. - Mobile & Browser Fluency: Deep understanding of iOS (and ideally Android) ecosystems, app store policies and web browser technologies, with genuine passion for what makes a great browsing experience. - Data-Driven Iteration: Comfort using analytics, funnels, A/B testing and user feedback to improve activation, retention and overall product quality. - User Obsession: Natural habit of studying apps, following trends on platforms like X/Twitter and Reddit, and testing experiences yourself to uncover opportunities. - Global & Growth Mindset: Interest or experience growing products in international markets with sensitivity to local user needs. - Bonus: - Experience with mobile browsers or privacy-focused products. - History of meaningfully scaling an app’s user base. - Currently maintaining your own side project or app on the App Store or Google Play. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3128 Hiring Ranges: Remote Sweden 512 925 kr - 863 900 kr SEK

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser, and Pocket, a service for keeping up with the best content online. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders - only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: We’re looking for a hands-on Mobile Product Manager with a primary focus on Firefox for iOS, while also contributing across mobile (including Android). This role is about building a better browser, turning downloads into loyal users, and creating experiences that truly stand out. If you’ve shipped mobile apps, obsess over details that improve everyday use, and love turning user insights into real improvements, this is a great opportunity to drive impact at Firefox. What you’ll do: - Build a fundamentally better browser experience: fix bugs, refine UI and navigation, improve downloads, menus, performance, and all the small details that make Firefox noticeably better for users who care about privacy, quality and reliability. - Drive strong activation and retention: focus on the new-user journey, quickly hooking people after they install the app, understanding where they drop off, and relentlessly optimizing the funnel through data, testing and iteration. - Deliver differentiating features and experiences that make Firefox stickier for key user groups, the kinds of things others can’t or won’t build. - Work closely with engineers, designers, data science and TPMs to ship high-impact improvements while balancing user needs, technical constraints, privacy and performance goals. - Stay deeply connected to real users: track App Store trends and discussions, test apps hands-on, analyze reviews and analytics, and turn those insights into concrete enhancements for Firefox on iOS and Android. - Monitor app health in App Store Connect and Google Play Console (crashes, ANRs, ratings) and support acquisition/retention efforts through ASO, store listings and growth experiments. - Adapt and optimize Firefox for global markets (Europe, Japan, Asia etc.), keeping cultural differences and local realities like data constraints in mind. What you'll bring: - Proven Shipping Experience: Hands-on experience launching or managing apps on the iOS App Store and/or Google Play Store, with clear impact on user experience and metrics. - Execution Focus: A strong track record of delivering features and improvements under deadlines through effective collaboration with engineering, design and cross-functional partners. - Mobile & Browser Fluency: Deep understanding of iOS (and ideally Android) ecosystems, app store policies and web browser technologies, with genuine passion for what makes a great browsing experience. - Data-Driven Iteration: Comfort using analytics, funnels, A/B testing and user feedback to improve activation, retention and overall product quality. - User Obsession: Natural habit of studying apps, following trends on platforms like X/Twitter and Reddit, and testing experiences yourself to uncover opportunities. - Global & Growth Mindset: Interest or experience growing products in international markets with sensitivity to local user needs. - Bonus: - Experience with mobile browsers or privacy-focused products. - History of meaningfully scaling an app’s user base. - Currently maintaining your own side project or app on the App Store or Google Play. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3128 Hiring Ranges: Remote Germany €68.000 - €91.000 EUR

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net The opportunity Thunderbird is expanding beyond email with Thunderbolt, an open-source AI client designed for organizations that need more control over their data, infrastructure, and model choices. We’re looking for a Staff Designer to help shape the product experience for Thunderbolt as it moves from early product development into enterprise use cases. This role sits at the intersection of product design, front-end engineering, prototyping, and AI-assisted product development. You’ll turn early product ideas, user needs, partner feedback, and workflow concepts into working prototypes and production-ready user experiences. This is not a role focused only on mockups or design artifacts. You’ll work directly in the codebase, use AI-assisted development tools thoughtfully, and help define the interaction patterns that make Thunderbolt intuitive, useful, trustworthy, and enterprise-ready. You should be comfortable operating independently in ambiguity, moving quickly from concept to prototype, distinguishing between experiments and production-ready work, and creating reusable product and interaction patterns that help the broader team move faster. What you’ll do - Build functional prototypes and product experiments directly in the Thunderbolt codebase. - Translate ambiguous product ideas, user workflows, partner feedback, and enterprise needs into clear, usable product experiences. - Help define interaction patterns for AI-powered chat, search, research, workflow automation, knowledge retrieval, and enterprise administration. - Use AI-assisted development tools to accelerate prototyping and implementation while maintaining strong judgment around quality, usability, security, accessibility, and maintainability. - Partner closely with product, design, engineering, and enterprise-facing teams to explore, validate, and refine product direction. - Contribute production-quality front-end code where appropriate. - Identify when a prototype should be discarded, refined, generalized, or productionized. - Improve the usability, accessibility, consistency, and polish of the Thunderbolt user experience. - Help develop reusable components, interface patterns, or design-system elements that create leverage for the broader product team. - Bring a user-centered perspective to technical and product discussions, especially where AI behavior, user trust, transparency, permissions, or workflow clarity are important. - Consider enterprise needs when designing product experiences, including data sensitivity, user control, administrative visibility, auditability, and security expectations. - Contribute to a product culture that values speed, clarity, experimentation, maintainability, responsible AI use, and thoughtful user experience. What you bring - 10+ years of relevant experience in design engineering, front-end engineering, UX engineering, product design with strong technical implementation experience, or a closely related role, with demonstrated leadership and impact beyond individual deliverables. - Strong front-end engineering skills, including experience with modern JavaScript or TypeScript, component-based frameworks, and building prototypes or production features directly in an application codebase. - Strong product and interaction design judgment, including usability, accessibility, information architecture, workflow design, and product polish. - Experience designing, prototyping, or building AI-enabled product experiences, such as chat, search, research tools, agents, automation, knowledge interfaces, or workflow tools where user trust, context, output quality, and human oversight are central to the experience. - Experience translating ambiguous product concepts into usable workflows, prototypes, and shipped product experiences, with the judgment to balance speed, quality, maintainability, learning, and product risk. - Experience providing technical or product leadership through mentoring, cross-functional coordination, reusable patterns, project ownership, or influence beyond individual deliverables. - Practical awareness of AI, privacy, security, and regulatory considerations that may affect product experience, including transparency, user control, permissions, data handling, and trust; familiarity with frameworks such as the EU AI Act, Cyber Resilience Act, HIPAA, or comparable responsible AI, privacy, and security requirements. - Strong communication and collaboration skills, including experience working closely with product managers, designers, engineers, and other cross-functional stakeholders. - Portfolio, case studies, shipped work, or examples demonstrating design-to-code execution, interactive prototypes, or product experience improvements. Bonus points for - Experience with enterprise software, developer tools, productivity tools, collaboration tools, self-hosted software, or other technical user workflows. - Experience contributing to design systems, component libraries, reusable front-end architecture, or shared product interaction patterns. - Familiarity with user research, usability testing, product discovery, feature instrumentation, or rapid experimentation methods. - Experience working in open-source or highly collaborative engineering environments. What success looks like In this role, you will help Thunderbolt move from ideas and early workflows into clear, usable, high-quality product experiences. You’ll create prototypes that clarify direction, reusable patterns that help the team move faster, and production experiences that make AI-powered workflows easier to understand and trust. A successful Staff Design Engineer will help the team decide what is worth building, what needs more testing, and what should not move forward. You’ll raise the quality of Thunderbolt’s user experience while helping the product remain fast-moving, practical, and enterprise-ready. Work environment You’ll work with our passionate staff and open-source community members from all over the globe to support the mission and objectives of MZLA Technologies Corporation. In this role, you’ll also collaborate closely with engineering, product, design, enterprise-facing teams, contractors, and external contributors working on Thunderbolt. This is a remote, full-time position. Strong communication and documentation skills are essential for effective collaboration across time zones and disciplines. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - Canada : $155,000 - $175,000 CAD We may consider candidates with strong skills but less than the required experience. Title, level and compensation will be determined based on qualifications and experience. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - RRSP contributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation.

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser, and Pocket, a service for keeping up with the best content online. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders - only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: We’re looking for a hands-on Mobile Product Manager with a primary focus on Firefox for iOS, while also contributing across mobile (including Android). This role is about building a better browser, turning downloads into loyal users, and creating experiences that truly stand out. If you’ve shipped mobile apps, obsess over details that improve everyday use, and love turning user insights into real improvements, this is a great opportunity to drive impact at Firefox. What you’ll do: - Build a fundamentally better browser experience: fix bugs, refine UI and navigation, improve downloads, menus, performance, and all the small details that make Firefox noticeably better for users who care about privacy, quality and reliability. - Drive strong activation and retention: focus on the new-user journey, quickly hooking people after they install the app, understanding where they drop off, and relentlessly optimizing the funnel through data, testing and iteration. - Deliver differentiating features and experiences that make Firefox stickier for key user groups, the kinds of things others can’t or won’t build. - Work closely with engineers, designers, data science and TPMs to ship high-impact improvements while balancing user needs, technical constraints, privacy and performance goals. - Stay deeply connected to real users: track App Store trends and discussions, test apps hands-on, analyze reviews and analytics, and turn those insights into concrete enhancements for Firefox on iOS and Android. - Monitor app health in App Store Connect and Google Play Console (crashes, ANRs, ratings) and support acquisition/retention efforts through ASO, store listings and growth experiments. - Adapt and optimize Firefox for global markets (Europe, Japan, Asia etc.), keeping cultural differences and local realities like data constraints in mind. What you'll bring: - Proven Shipping Experience: Hands-on experience launching or managing apps on the iOS App Store and/or Google Play Store, with clear impact on user experience and metrics. - Execution Focus: A strong track record of delivering features and improvements under deadlines through effective collaboration with engineering, design and cross-functional partners. - Mobile & Browser Fluency: Deep understanding of iOS (and ideally Android) ecosystems, app store policies and web browser technologies, with genuine passion for what makes a great browsing experience. - Data-Driven Iteration: Comfort using analytics, funnels, A/B testing and user feedback to improve activation, retention and overall product quality. - User Obsession: Natural habit of studying apps, following trends on platforms like X/Twitter and Reddit, and testing experiences yourself to uncover opportunities. - Global & Growth Mindset: Interest or experience growing products in international markets with sensitivity to local user needs. - Bonus: - Experience with mobile browsers or privacy-focused products. - History of meaningfully scaling an app’s user base. - Currently maintaining your own side project or app on the App Store or Google Play. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3128 Hiring Ranges: Remote France €53.000 - €71.000 EUR

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net The opportunity Thunderbird is expanding beyond email with Thunderbolt, an open-source AI client designed for organizations that need more control over their data, infrastructure, and model choices. We’re looking for a Staff Designer to help shape the product experience for Thunderbolt as it moves from early product development into enterprise use cases. This role sits at the intersection of product design, front-end engineering, prototyping, and AI-assisted product development. You’ll turn early product ideas, user needs, partner feedback, and workflow concepts into working prototypes and production-ready user experiences. This is not a role focused only on mockups or design artifacts. You’ll work directly in the codebase, use AI-assisted development tools thoughtfully, and help define the interaction patterns that make Thunderbolt intuitive, useful, trustworthy, and enterprise-ready. You should be comfortable operating independently in ambiguity, moving quickly from concept to prototype, distinguishing between experiments and production-ready work, and creating reusable product and interaction patterns that help the broader team move faster. What you’ll do - Build functional prototypes and product experiments directly in the Thunderbolt codebase. - Translate ambiguous product ideas, user workflows, partner feedback, and enterprise needs into clear, usable product experiences. - Help define interaction patterns for AI-powered chat, search, research, workflow automation, knowledge retrieval, and enterprise administration. - Use AI-assisted development tools to accelerate prototyping and implementation while maintaining strong judgment around quality, usability, security, accessibility, and maintainability. - Partner closely with product, design, engineering, and enterprise-facing teams to explore, validate, and refine product direction. - Contribute production-quality front-end code where appropriate. - Identify when a prototype should be discarded, refined, generalized, or productionized. - Improve the usability, accessibility, consistency, and polish of the Thunderbolt user experience. - Help develop reusable components, interface patterns, or design-system elements that create leverage for the broader product team. - Bring a user-centered perspective to technical and product discussions, especially where AI behavior, user trust, transparency, permissions, or workflow clarity are important. - Consider enterprise needs when designing product experiences, including data sensitivity, user control, administrative visibility, auditability, and security expectations. - Contribute to a product culture that values speed, clarity, experimentation, maintainability, responsible AI use, and thoughtful user experience. What you bring - 10+ years of relevant experience in design engineering, front-end engineering, UX engineering, product design with strong technical implementation experience, or a closely related role, with demonstrated leadership and impact beyond individual deliverables. - Strong front-end engineering skills, including experience with modern JavaScript or TypeScript, component-based frameworks, and building prototypes or production features directly in an application codebase. - Strong product and interaction design judgment, including usability, accessibility, information architecture, workflow design, and product polish. - Experience designing, prototyping, or building AI-enabled product experiences, such as chat, search, research tools, agents, automation, knowledge interfaces, or workflow tools where user trust, context, output quality, and human oversight are central to the experience. - Experience translating ambiguous product concepts into usable workflows, prototypes, and shipped product experiences, with the judgment to balance speed, quality, maintainability, learning, and product risk. - Experience providing technical or product leadership through mentoring, cross-functional coordination, reusable patterns, project ownership, or influence beyond individual deliverables. - Practical awareness of AI, privacy, security, and regulatory considerations that may affect product experience, including transparency, user control, permissions, data handling, and trust; familiarity with frameworks such as the EU AI Act, Cyber Resilience Act, HIPAA, or comparable responsible AI, privacy, and security requirements. - Strong communication and collaboration skills, including experience working closely with product managers, designers, engineers, and other cross-functional stakeholders. - Portfolio, case studies, shipped work, or examples demonstrating design-to-code execution, interactive prototypes, or product experience improvements. Bonus points for - Experience with enterprise software, developer tools, productivity tools, collaboration tools, self-hosted software, or other technical user workflows. - Experience contributing to design systems, component libraries, reusable front-end architecture, or shared product interaction patterns. - Familiarity with user research, usability testing, product discovery, feature instrumentation, or rapid experimentation methods. - Experience working in open-source or highly collaborative engineering environments. What success looks like In this role, you will help Thunderbolt move from ideas and early workflows into clear, usable, high-quality product experiences. You’ll create prototypes that clarify direction, reusable patterns that help the team move faster, and production experiences that make AI-powered workflows easier to understand and trust. A successful Staff Design Engineer will help the team decide what is worth building, what needs more testing, and what should not move forward. You’ll raise the quality of Thunderbolt’s user experience while helping the product remain fast-moving, practical, and enterprise-ready. Work environment You’ll work with our passionate staff and open-source community members from all over the globe to support the mission and objectives of MZLA Technologies Corporation. In this role, you’ll also collaborate closely with engineering, product, design, enterprise-facing teams, contractors, and external contributors working on Thunderbolt. This is a remote, full-time position. Strong communication and documentation skills are essential for effective collaboration across time zones and disciplines. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - US : $185,000 - $205,000 USD We may consider candidates with strong skills but less than the required experience. Title, level and compensation will be determined based on qualifications and experience. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - 401(k) contributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation.

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser, and Pocket, a service for keeping up with the best content online. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders - only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: We’re looking for a hands-on Mobile Product Manager with a primary focus on Firefox for iOS, while also contributing across mobile (including Android). This role is about building a better browser, turning downloads into loyal users, and creating experiences that truly stand out. If you’ve shipped mobile apps, obsess over details that improve everyday use, and love turning user insights into real improvements, this is a great opportunity to drive impact at Firefox. What you’ll do: - Build a fundamentally better browser experience: fix bugs, refine UI and navigation, improve downloads, menus, performance, and all the small details that make Firefox noticeably better for users who care about privacy, quality and reliability. - Drive strong activation and retention: focus on the new-user journey, quickly hooking people after they install the app, understanding where they drop off, and relentlessly optimizing the funnel through data, testing and iteration. - Deliver differentiating features and experiences that make Firefox stickier for key user groups, the kinds of things others can’t or won’t build. - Work closely with engineers, designers, data science and TPMs to ship high-impact improvements while balancing user needs, technical constraints, privacy and performance goals. - Stay deeply connected to real users: track App Store trends and discussions, test apps hands-on, analyze reviews and analytics, and turn those insights into concrete enhancements for Firefox on iOS and Android. - Monitor app health in App Store Connect and Google Play Console (crashes, ANRs, ratings) and support acquisition/retention efforts through ASO, store listings and growth experiments. - Adapt and optimize Firefox for global markets (Europe, Japan, Asia etc.), keeping cultural differences and local realities like data constraints in mind. What you'll bring: - Proven Shipping Experience: Hands-on experience launching or managing apps on the iOS App Store and/or Google Play Store, with clear impact on user experience and metrics. - Execution Focus: A strong track record of delivering features and improvements under deadlines through effective collaboration with engineering, design and cross-functional partners. - Mobile & Browser Fluency: Deep understanding of iOS (and ideally Android) ecosystems, app store policies and web browser technologies, with genuine passion for what makes a great browsing experience. - Data-Driven Iteration: Comfort using analytics, funnels, A/B testing and user feedback to improve activation, retention and overall product quality. - User Obsession: Natural habit of studying apps, following trends on platforms like X/Twitter and Reddit, and testing experiences yourself to uncover opportunities. - Global & Growth Mindset: Interest or experience growing products in international markets with sensitivity to local user needs. - Bonus: - Experience with mobile browsers or privacy-focused products. - History of meaningfully scaling an app’s user base. - Currently maintaining your own side project or app on the App Store or Google Play. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-DNI Req ID: R3128 Hiring Ranges: Canada Tier 1 Locations $104,000 - $139,000 CAD Canada Tier 2 Locations $95,000 - $126,000 CAD

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net The opportunity Thunderbird is expanding beyond email with Thunderbolt, an open-source AI client designed for organizations that need more control over their data, infrastructure, and model choices. We’re looking for a Staff Designer to help shape the product experience for Thunderbolt as it moves from early product development into enterprise use cases. This role sits at the intersection of product design, front-end engineering, prototyping, and AI-assisted product development. You’ll turn early product ideas, user needs, partner feedback, and workflow concepts into working prototypes and production-ready user experiences. This is not a role focused only on mockups or design artifacts. You’ll work directly in the codebase, use AI-assisted development tools thoughtfully, and help define the interaction patterns that make Thunderbolt intuitive, useful, trustworthy, and enterprise-ready. You should be comfortable operating independently in ambiguity, moving quickly from concept to prototype, distinguishing between experiments and production-ready work, and creating reusable product and interaction patterns that help the broader team move faster. What you’ll do - Build functional prototypes and product experiments directly in the Thunderbolt codebase. - Translate ambiguous product ideas, user workflows, partner feedback, and enterprise needs into clear, usable product experiences. - Help define interaction patterns for AI-powered chat, search, research, workflow automation, knowledge retrieval, and enterprise administration. - Use AI-assisted development tools to accelerate prototyping and implementation while maintaining strong judgment around quality, usability, security, accessibility, and maintainability. - Partner closely with product, design, engineering, and enterprise-facing teams to explore, validate, and refine product direction. - Contribute production-quality front-end code where appropriate. - Identify when a prototype should be discarded, refined, generalized, or productionized. - Improve the usability, accessibility, consistency, and polish of the Thunderbolt user experience. - Help develop reusable components, interface patterns, or design-system elements that create leverage for the broader product team. - Bring a user-centered perspective to technical and product discussions, especially where AI behavior, user trust, transparency, permissions, or workflow clarity are important. - Consider enterprise needs when designing product experiences, including data sensitivity, user control, administrative visibility, auditability, and security expectations. - Contribute to a product culture that values speed, clarity, experimentation, maintainability, responsible AI use, and thoughtful user experience. What you bring - 10+ years of relevant experience in design engineering, front-end engineering, UX engineering, product design with strong technical implementation experience, or a closely related role, with demonstrated leadership and impact beyond individual deliverables. - Strong front-end engineering skills, including experience with modern JavaScript or TypeScript, component-based frameworks, and building prototypes or production features directly in an application codebase. - Strong product and interaction design judgment, including usability, accessibility, information architecture, workflow design, and product polish. - Experience designing, prototyping, or building AI-enabled product experiences, such as chat, search, research tools, agents, automation, knowledge interfaces, or workflow tools where user trust, context, output quality, and human oversight are central to the experience. - Experience translating ambiguous product concepts into usable workflows, prototypes, and shipped product experiences, with the judgment to balance speed, quality, maintainability, learning, and product risk. - Experience providing technical or product leadership through mentoring, cross-functional coordination, reusable patterns, project ownership, or influence beyond individual deliverables. - Practical awareness of AI, privacy, security, and regulatory considerations that may affect product experience, including transparency, user control, permissions, data handling, and trust; familiarity with frameworks such as the EU AI Act, Cyber Resilience Act, HIPAA, or comparable responsible AI, privacy, and security requirements. - Strong communication and collaboration skills, including experience working closely with product managers, designers, engineers, and other cross-functional stakeholders. - Portfolio, case studies, shipped work, or examples demonstrating design-to-code execution, interactive prototypes, or product experience improvements. Bonus points for - Experience with enterprise software, developer tools, productivity tools, collaboration tools, self-hosted software, or other technical user workflows. - Experience contributing to design systems, component libraries, reusable front-end architecture, or shared product interaction patterns. - Familiarity with user research, usability testing, product discovery, feature instrumentation, or rapid experimentation methods. - Experience working in open-source or highly collaborative engineering environments. What success looks like In this role, you will help Thunderbolt move from ideas and early workflows into clear, usable, high-quality product experiences. You’ll create prototypes that clarify direction, reusable patterns that help the team move faster, and production experiences that make AI-powered workflows easier to understand and trust. A successful Staff Design Engineer will help the team decide what is worth building, what needs more testing, and what should not move forward. You’ll raise the quality of Thunderbolt’s user experience while helping the product remain fast-moving, practical, and enterprise-ready. Work environment You’ll work with our passionate staff and open-source community members from all over the globe to support the mission and objectives of MZLA Technologies Corporation. In this role, you’ll also collaborate closely with engineering, product, design, enterprise-facing teams, contractors, and external contributors working on Thunderbolt. This is a remote, full-time position. Strong communication and documentation skills are essential for effective collaboration across time zones and disciplines. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - Canada : $155,000 - $175,000 CAD - US : $185,000 - $205,000 USD We may consider candidates with strong skills but less than the required experience. Title, level and compensation will be determined based on qualifications and experience. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - 401(k) / RRSP contributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation. LI-DNI

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser, and Pocket, a service for keeping up with the best content online. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders - only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: We’re looking for a hands-on Mobile Product Manager with a primary focus on Firefox for iOS, while also contributing across mobile (including Android). This role is about building a better browser, turning downloads into loyal users, and creating experiences that truly stand out. If you’ve shipped mobile apps, obsess over details that improve everyday use, and love turning user insights into real improvements, this is a great opportunity to drive impact at Firefox. What you’ll do: - Build a fundamentally better browser experience: fix bugs, refine UI and navigation, improve downloads, menus, performance, and all the small details that make Firefox noticeably better for users who care about privacy, quality and reliability. - Drive strong activation and retention: focus on the new-user journey, quickly hooking people after they install the app, understanding where they drop off, and relentlessly optimizing the funnel through data, testing and iteration. - Deliver differentiating features and experiences that make Firefox stickier for key user groups, the kinds of things others can’t or won’t build. - Work closely with engineers, designers, data science and TPMs to ship high-impact improvements while balancing user needs, technical constraints, privacy and performance goals. - Stay deeply connected to real users: track App Store trends and discussions, test apps hands-on, analyze reviews and analytics, and turn those insights into concrete enhancements for Firefox on iOS and Android. - Monitor app health in App Store Connect and Google Play Console (crashes, ANRs, ratings) and support acquisition/retention efforts through ASO, store listings and growth experiments. - Adapt and optimize Firefox for global markets (Europe, Japan, Asia etc.), keeping cultural differences and local realities like data constraints in mind. What you'll bring: - Proven Shipping Experience: Hands-on experience launching or managing apps on the iOS App Store and/or Google Play Store, with clear impact on user experience and metrics. - Execution Focus: A strong track record of delivering features and improvements under deadlines through effective collaboration with engineering, design and cross-functional partners. - Mobile & Browser Fluency: Deep understanding of iOS (and ideally Android) ecosystems, app store policies and web browser technologies, with genuine passion for what makes a great browsing experience. - Data-Driven Iteration: Comfort using analytics, funnels, A/B testing and user feedback to improve activation, retention and overall product quality. - User Obsession: Natural habit of studying apps, following trends on platforms like X/Twitter and Reddit, and testing experiences yourself to uncover opportunities. - Global & Growth Mindset: Interest or experience growing products in international markets with sensitivity to local user needs. - Bonus: - Experience with mobile browsers or privacy-focused products. - History of meaningfully scaling an app’s user base. - Currently maintaining your own side project or app on the App Store or Google Play. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3128 Hiring Ranges: Remote Netherlands €66.000 - €88.000 EUR

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. What you’ll do: - Advance Firefox's security architecture and cryptography stack: Contribute to improvements in Firefox's core security systems, with a focus on cryptographic protocols, WebPKI, and security-sensitive web APIs. Help implement and maintain security features that support the evolution of public key infrastructure on the web. - Design and implement web platform security features: Develop and ship web platform features in collaboration with teammates and the broader web community. Contribute to standards-based, secure, and interoperable implementations across Firefox. - Improve browser reliability, performance, and resource efficiency: Investigate and resolve issues impacting stability, correctness, and performance. Analyze and improve memory usage and efficiency within a complex, multi-threaded browser environment. - Collaborate on security initiatives: Partner with engineers across teams to identify, prioritize, and address security issues. Participate in debugging, root cause analysis, and implementation of effective long-term solutions. - Contribute to technical design and planning: Participate in technical discussions, design reviews, and project planning for security-related initiatives. Help evaluate tradeoffs and contribute to engineering decisions within your area of work. What you’ll bring: - Strong software engineering and security fundamentals: Experience in software engineering, with proficiency in C/C++ and a solid understanding of security principles, including cryptographic protocols and implementations. - Experience building and maintaining complex software systems: Ability to contribute to the design, implementation, testing, and maintenance of software in large-scale or security-sensitive environments. - Strong debugging and problem-solving skills: Expertise in diagnosing and resolving issues in multi-threaded, cross-platform native applications, including performance and memory-related challenges. - Collaborative and effective communicator: Ability to work effectively with distributed teams, communicate technical concepts clearly, and collaborate constructively to solve problems. - Growth mindset and willingness to learn : Demonstrated curiosity and desire to deepen expertise in browser security, cryptography, and systems programming while continuously improving engineering skills. - Web platform and modern systems experience: Familiarity with web technologies and interest or experience in Rust. Comfortable working within large, complex, multi-language codebases. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3155 Hiring Ranges: Remote Netherlands €66.000 - €88.000 EUR

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser, and Pocket, a service for keeping up with the best content online. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders - only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: We’re looking for a hands-on Mobile Product Manager with a primary focus on Firefox for iOS, while also contributing across mobile (including Android). This role is about building a better browser, turning downloads into loyal users, and creating experiences that truly stand out. If you’ve shipped mobile apps, obsess over details that improve everyday use, and love turning user insights into real improvements, this is a great opportunity to drive impact at Firefox. What you’ll do: - Build a fundamentally better browser experience: fix bugs, refine UI and navigation, improve downloads, menus, performance, and all the small details that make Firefox noticeably better for users who care about privacy, quality and reliability. - Drive strong activation and retention: focus on the new-user journey, quickly hooking people after they install the app, understanding where they drop off, and relentlessly optimizing the funnel through data, testing and iteration. - Deliver differentiating features and experiences that make Firefox stickier for key user groups, the kinds of things others can’t or won’t build. - Work closely with engineers, designers, data science and TPMs to ship high-impact improvements while balancing user needs, technical constraints, privacy and performance goals. - Stay deeply connected to real users: track App Store trends and discussions, test apps hands-on, analyze reviews and analytics, and turn those insights into concrete enhancements for Firefox on iOS and Android. - Monitor app health in App Store Connect and Google Play Console (crashes, ANRs, ratings) and support acquisition/retention efforts through ASO, store listings and growth experiments. - Adapt and optimize Firefox for global markets (Europe, Japan, Asia etc.), keeping cultural differences and local realities like data constraints in mind. What you'll bring: - Proven Shipping Experience: Hands-on experience launching or managing apps on the iOS App Store and/or Google Play Store, with clear impact on user experience and metrics. - Execution Focus: A strong track record of delivering features and improvements under deadlines through effective collaboration with engineering, design and cross-functional partners. - Mobile & Browser Fluency: Deep understanding of iOS (and ideally Android) ecosystems, app store policies and web browser technologies, with genuine passion for what makes a great browsing experience. - Data-Driven Iteration: Comfort using analytics, funnels, A/B testing and user feedback to improve activation, retention and overall product quality. - User Obsession: Natural habit of studying apps, following trends on platforms like X/Twitter and Reddit, and testing experiences yourself to uncover opportunities. - Global & Growth Mindset: Interest or experience growing products in international markets with sensitivity to local user needs. - Bonus: - Experience with mobile browsers or privacy-focused products. - History of meaningfully scaling an app’s user base. - Currently maintaining your own side project or app on the App Store or Google Play. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3128 Hiring Ranges: Remote Finland €45.000 - €60.000 EUR

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser, and Pocket, a service for keeping up with the best content online. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders - only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: We’re looking for a hands-on Mobile Product Manager with a primary focus on Firefox for iOS, while also contributing across mobile (including Android). This role is about building a better browser, turning downloads into loyal users, and creating experiences that truly stand out. If you’ve shipped mobile apps, obsess over details that improve everyday use, and love turning user insights into real improvements, this is a great opportunity to drive impact at Firefox. What you’ll do: - Build a fundamentally better browser experience: fix bugs, refine UI and navigation, improve downloads, menus, performance, and all the small details that make Firefox noticeably better for users who care about privacy, quality and reliability. - Drive strong activation and retention: focus on the new-user journey, quickly hooking people after they install the app, understanding where they drop off, and relentlessly optimizing the funnel through data, testing and iteration. - Deliver differentiating features and experiences that make Firefox stickier for key user groups, the kinds of things others can’t or won’t build. - Work closely with engineers, designers, data science and TPMs to ship high-impact improvements while balancing user needs, technical constraints, privacy and performance goals. - Stay deeply connected to real users: track App Store trends and discussions, test apps hands-on, analyze reviews and analytics, and turn those insights into concrete enhancements for Firefox on iOS and Android. - Monitor app health in App Store Connect and Google Play Console (crashes, ANRs, ratings) and support acquisition/retention efforts through ASO, store listings and growth experiments. - Adapt and optimize Firefox for global markets (Europe, Japan, Asia etc.), keeping cultural differences and local realities like data constraints in mind. What you'll bring: - Proven Shipping Experience: Hands-on experience launching or managing apps on the iOS App Store and/or Google Play Store, with clear impact on user experience and metrics. - Execution Focus: A strong track record of delivering features and improvements under deadlines through effective collaboration with engineering, design and cross-functional partners. - Mobile & Browser Fluency: Deep understanding of iOS (and ideally Android) ecosystems, app store policies and web browser technologies, with genuine passion for what makes a great browsing experience. - Data-Driven Iteration: Comfort using analytics, funnels, A/B testing and user feedback to improve activation, retention and overall product quality. - User Obsession: Natural habit of studying apps, following trends on platforms like X/Twitter and Reddit, and testing experiences yourself to uncover opportunities. - Global & Growth Mindset: Interest or experience growing products in international markets with sensitivity to local user needs. - Bonus: - Experience with mobile browsers or privacy-focused products. - History of meaningfully scaling an app’s user base. - Currently maintaining your own side project or app on the App Store or Google Play. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3128 Hiring Ranges: Remote Spain €58.000 - €77.000 EUR

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net and www.thunderbolt.io The opportunity MZLA is entering a new phase of growth as we bring Thunderbird, Thunderbolt, and other current and future products and services into the enterprise market. Our enterprise approach will be partner-led, with external partners leading sales, implementation, and ongoing customer relationships while MZLA provides the products, technical expertise, and subject-matter knowledge needed for success. Our move into the enterprise market is being shaped in part by growing interest in digital sovereignty, particularly in Europe , where enterprises and public-sector organizations are placing greater emphasis on control over data and infrastructure, deployment flexibility, privacy, security, interoperability, and reduced vendor dependence. We are looking for a Senior Lead, Enterprise Partnerships & Strategy to add dedicated partnership and commercial expertise to work already underway . You will partner closely with the CEO, senior leadership, and cross-functional teams to shape MZLA’s enterprise strategy, evaluate opportunities, develop partnership and commercial models, shape pricing and packaging, and advance a cohesive enterprise offering across our products and services. This is not a traditional sales or account-management role. The focus is on building MZLA’s partner-led enterprise approach, including partnership strategy, commercial models, pricing, and coordination across product and technical teams; external partners will lead direct sales and ongoing customer relationships. This is a hands-on role in a lean environment. It is an individual contributor role focused on doing the work directly, not on building or managing an enterprise team. Success will require someone who can operate credibly with senior leaders and external partners while remaining closely involved in the analysis, preparation, coordination, negotiation, and follow-through needed to move opportunities forward and build a more repeatable enterprise approach. This role requires regular working-hour overlap with colleagues in North American time zones, as well as flexibility to meet with partners and stakeholders across Europe. This role will also include periodic travel, including international, to meet with partners, prospective customers and represent MZLA at relevant industry events. What you’ll do - Help define and execute an enterprise strategy across MZLA’s products and services. - Translate digital sovereignty priorities into clear enterprise and partnership requirements. - Identify, evaluate, and advance enterprise opportunities and strategic partnerships, particularly in Europe and other sovereignty-focused markets. - Work with stakeholders to clarify roles across MZLA, external partners, and other Mozilla entities. - Develop pricing, packaging, licensing, reseller, revenue-sharing, support, implementation, and other commercial models. - Lead or support partner negotiations and senior-level commercial discussions. - Work closely with product and engineering teams to understand capabilities, deployment options, integrations, security and privacy considerations, support requirements, and roadmap dependencies. - Translate technical capabilities into clear enterprise propositions and partner plans. - Build practical processes and decision frameworks that support repeatable execution and help ensure external commitments remain realistic and supportable. What you bring - 15+ years of relevant professional experience, including substantial experience working with enterprise software, developer platforms, infrastructure, AI, data platforms, or similarly technical B2B technology products. - Experience building a new partnership, enterprise, platform, or commercial capability in a partner-led environment. - Experience working with European enterprises, public-sector organizations, regulated institutions, technology partners, or similarly complex stakeholders. - Strong understanding of digital sovereignty and the commercial, technical, regulatory, legal, and procurement considerations shaping technology decisions in Europe. - Experience working through resellers, systems integrators, implementation partners, or similar partner-led enterprise models. - Demonstrated experience developing and negotiating pricing, packaging, licensing, reseller, revenue-sharing, implementation, support, or similar commercial models, with strong judgment around enterprise buying processes, deal economics, negotiation strategy, and complex procurement. - Technical and product fluency sufficient to work credibly with engineering, product, partner, and enterprise stakeholders and discuss integrations, deployment models, security, privacy, implementation requirements, and technical tradeoffs. - Strong executive communication, relationship-management, facilitation, and negotiation skills. - Ability to bring structure to ambiguous opportunities and move comfortably between strategy and detailed execution. - A collaborative, low-ego working style and the ability to influence without formal authority. - Strong alignment with Mozilla’s mission and values, including openness, privacy, user agency, trust, and long-term sustainability. - Ability and willingness to travel periodically, including internationally. Bonus points for - Experience with on-premises, self-hosted, private-cloud, in-region, or other customer-controlled deployment models. - Experience with open-source software, open standards, or open technology ecosystems. - Familiarity with AI-enabled software, enterprise search, knowledge systems, communications platforms, productivity tools, or privacy-oriented technology. - Experience building partnerships or enterprise initiatives in an early-stage company, new business unit, or newly established function. - Experience coordinating partnerships across affiliated organizations or a portfolio of related products. About you You are a strategic thinker who is equally comfortable working in the details. You know that successful partnerships depend on more than strong relationships: they require sound product judgment, clear commercial models, technical credibility, and disciplined execution. You understand that enterprise technology decisions are shaped not only by features and price, but also by control, jurisdiction, trust, interoperability, and long-term technology dependence. You can translate those considerations into practical enterprise and partnership strategies without overstating what a product or organization can deliver. You are comfortable representing an organization in senior external conversations while remaining hands-on with pricing, preparation, technical dependencies, coordination, and follow-through. You are motivated by building a durable enterprise capability in a lean environment rather than inheriting a mature program or immediately building a large team. Work environment This is a full-time, fully remote position. You’ll work with colleagues, partners, and customers across multiple countries and time zones, so strong communication and documentation skills are essential. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - Canada: $140,000-$180,000 CAD This is a salaried, non-commissioned role and is eligible for MZLA’s annual discretionary bonus program. The salary range shown reflects the intended level and scope of the position. We may consider candidates with strong relevant skills but less experience, in which case title, level, and compensation may be adjusted accordingly. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - RRSP contributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation. LI-REMOTE

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. What you’ll do: - Advance Firefox's security architecture and cryptography stack: Contribute to improvements in Firefox's core security systems, with a focus on cryptographic protocols, WebPKI, and security-sensitive web APIs. Help implement and maintain security features that support the evolution of public key infrastructure on the web. - Design and implement web platform security features: Develop and ship web platform features in collaboration with teammates and the broader web community. Contribute to standards-based, secure, and interoperable implementations across Firefox. - Improve browser reliability, performance, and resource efficiency: Investigate and resolve issues impacting stability, correctness, and performance. Analyze and improve memory usage and efficiency within a complex, multi-threaded browser environment. - Collaborate on security initiatives: Partner with engineers across teams to identify, prioritize, and address security issues. Participate in debugging, root cause analysis, and implementation of effective long-term solutions. - Contribute to technical design and planning: Participate in technical discussions, design reviews, and project planning for security-related initiatives. Help evaluate tradeoffs and contribute to engineering decisions within your area of work. What you’ll bring: - Strong software engineering and security fundamentals: Experience in software engineering, with proficiency in C/C++ and a solid understanding of security principles, including cryptographic protocols and implementations. - Experience building and maintaining complex software systems: Ability to contribute to the design, implementation, testing, and maintenance of software in large-scale or security-sensitive environments. - Strong debugging and problem-solving skills: Expertise in diagnosing and resolving issues in multi-threaded, cross-platform native applications, including performance and memory-related challenges. - Collaborative and effective communicator: Ability to work effectively with distributed teams, communicate technical concepts clearly, and collaborate constructively to solve problems. - Growth mindset and willingness to learn : Demonstrated curiosity and desire to deepen expertise in browser security, cryptography, and systems programming while continuously improving engineering skills. - Web platform and modern systems experience: Familiarity with web technologies and interest or experience in Rust. Comfortable working within large, complex, multi-language codebases. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3155 Hiring Ranges: Remote France €53.000 - €71.000 EUR

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net and www.thunderbolt.io. The opportunity Thunderbolt is an open-source, cross-platform AI product initiative from the team behind Thunderbird. It is being built around a clear principle: people and organizations should be able to use AI while staying in control of their data, infrastructure, model choices, and long-term options. Thunderbolt is designed to support flexible deployment models, integrations with AI tools and workflows, and use cases across desktop, web, and mobile. We are looking for a Senior Engineering Manager to lead engineering execution, people management, and operating practices for Thunderbolt as it moves from R&D incubation into a more mature product and enterprise development phase . This role will help the team define what production-ready means at this stage: stronger release discipline, clearer ownership, higher user-facing product quality, stronger engineering practices, and a more scalable operating model. This is a hands-on technical management role for a seasoned engineering leader who has helped early-stage products become reliable, production-ready, and enterprise-ready. You will manage and grow a small senior engineering team, stay close to code quality and technical execution , and partner closely with product and technical leadership to turn an open-source, privacy-respecting AI product into something organizations can deploy with confidence. We are looking for someone who has seen this stage before: a promising early product, a small senior team, real enterprise interest, incomplete process, and the need to move quickly without creating fragile systems or one-off customer work. What you’ll do - Lead engineering execution by clarifying priorities, ownership, timelines, risks, dependencies, and quality expectations. - Manage engineers and contractors, including coaching, feedback, prioritization, performance support, and team development. - Stay close to the codebase by contributing code, reviewing technical work, evaluating tradeoffs, and helping the team maintain momentum and quality. - Partner with technical and product leadership to turn product direction, AI strategy, user experience goals, and technical priorities into coordinated engineering plans. - Establish planning, review, release, and follow-through practices that improve predictability and reduce bottlenecks. - Maintain high standards for code quality, testing, documentation, reliability, security awareness, maintainability, and release readiness. - Build strong product and architectural context across AI-enabled workflows, integrations, local-first or customer-controlled architectures, and release requirements. - Partner across product, design, enterprise-facing teams, and technical leadership to balance speed, user experience, privacy, quality, enterprise readiness, and long-term sustainability. - Lead hiring, onboarding, and resource planning as the Thunderbolt engineering team grows. - Help Thunderbolt scale from an incubation-stage product into a reliable, enterprise-ready open-source AI product. What you bring - 15+ years of professional software development experience, including significant experience in senior engineering leadership or complex product delivery roles. - 5+ years of experience managing technical teams, including senior engineers or senior individual contributors. - A track record of leading a team that shipped polished, top-tier products held to a genuine standard of craft. - Strong ability to translate ambiguous product and technical direction into clear plans, ownership models, and delivery momentum. - Technical fluency with AI-enabled products, including the ability to evaluate tradeoffs across areas such as LLM applications, RAG workflows, agents, enterprise search, automation, on-device AI, or AI evaluation. - Demonstrated experience delivering complex applications across multiple platforms, such as desktop, web, and mobile, using technologies such as Tauri, Electron, React Native, or comparable frameworks. - Experience with enterprise software, regulated environments, or similarly complex technical products, including security, privacy, compliance readiness, administration, integrations, and customer-controlled deployment models. - Practical experience with local-first, offline-capable, self-hosted, hybrid, on-premise, air-gapped, or other customer-controlled product architectures, including tradeoffs related to data storage, sync, privacy, reliability, and user experience. - Experience improving engineering practices related to technical planning, code review, release readiness, testing, documentation, CI/CD, maintainability, or technical debt management. - Excellent communication skills around technical prioritization, release risk, ownership, quality expectations, and tradeoffs. Bonus points for - Experience working in open-source or maintainer-style engineering environments. - Experience with compliance or security standards such as SOC 2, HIPAA, ISO 27001, or similar frameworks. - Experience helping take a product from zero to one in a startup or new product initiative. What success looks like Success in this role means helping Thunderbolt make the leap from promising R&D-stage product to a production-ready, enterprise-grade open-source AI product that security-conscious organizations can deploy with confidence . Within the first year, the Senior Engineering Manager should help turn a fast-moving early product into a team and engineering system that can scale by helping the team: - Define what “production-ready” means for Thunderbolt and consistently meet that bar. - Create the clarity, ownership, and release confidence the team needs to ship quickly and sustainably. - Raise the quality of the user-facing product experience while protecting codebase health, maintainability, privacy, and security. - Build the lightweight structure needed for a senior team to do its best work without slowing down experimentation. - Help build Thunderbolt for global scale, enterprise adoption, and real-world impact! Work environment This is a full-time , fully remote position. You’ll work with our passionate staff, open-source community members and partners from all over the globe. Strong communication and documentation skills are essential for effective collaboration across time zones and disciplines. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - Canada : $190,000 - $220,000 CAD In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - RRSP contributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation. LI-REMOTE

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser, and Pocket, a service for keeping up with the best content online. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders - only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: We’re looking for a hands-on Mobile Product Manager with a primary focus on Firefox for iOS, while also contributing across mobile (including Android). This role is about building a better browser, turning downloads into loyal users, and creating experiences that truly stand out. If you’ve shipped mobile apps, obsess over details that improve everyday use, and love turning user insights into real improvements, this is a great opportunity to drive impact at Firefox. What you’ll do: - Build a fundamentally better browser experience: fix bugs, refine UI and navigation, improve downloads, menus, performance, and all the small details that make Firefox noticeably better for users who care about privacy, quality and reliability. - Drive strong activation and retention: focus on the new-user journey, quickly hooking people after they install the app, understanding where they drop off, and relentlessly optimizing the funnel through data, testing and iteration. - Deliver differentiating features and experiences that make Firefox stickier for key user groups, the kinds of things others can’t or won’t build. - Work closely with engineers, designers, data science and TPMs to ship high-impact improvements while balancing user needs, technical constraints, privacy and performance goals. - Stay deeply connected to real users: track App Store trends and discussions, test apps hands-on, analyze reviews and analytics, and turn those insights into concrete enhancements for Firefox on iOS and Android. - Monitor app health in App Store Connect and Google Play Console (crashes, ANRs, ratings) and support acquisition/retention efforts through ASO, store listings and growth experiments. - Adapt and optimize Firefox for global markets (Europe, Japan, Asia etc.), keeping cultural differences and local realities like data constraints in mind. What you'll bring: - Proven Shipping Experience: Hands-on experience launching or managing apps on the iOS App Store and/or Google Play Store, with clear impact on user experience and metrics. - Execution Focus: A strong track record of delivering features and improvements under deadlines through effective collaboration with engineering, design and cross-functional partners. - Mobile & Browser Fluency: Deep understanding of iOS (and ideally Android) ecosystems, app store policies and web browser technologies, with genuine passion for what makes a great browsing experience. - Data-Driven Iteration: Comfort using analytics, funnels, A/B testing and user feedback to improve activation, retention and overall product quality. - User Obsession: Natural habit of studying apps, following trends on platforms like X/Twitter and Reddit, and testing experiences yourself to uncover opportunities. - Global & Growth Mindset: Interest or experience growing products in international markets with sensitivity to local user needs. - Bonus: - Experience with mobile browsers or privacy-focused products. - History of meaningfully scaling an app’s user base. - Currently maintaining your own side project or app on the App Store or Google Play. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3128 Hiring Ranges: Remote UK £66,000 - £87,000 GBP

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: The Mozilla Firefox Performance team is a community of engineers who care deeply about delivering the fastest browser possible. We are the team responsible for making all parts of the browser go fast. Our team is geographically-distributed, and working in the open is the norm. We contribute to the code driving the Firefox browser on a number of platforms - Windows, Android, Linux, and macOS. Our focus is on finding and fixing things that slow down the browser as well as helping other teams write fast and reliable code to make Firefox excellent for users. Do you value curiosity and enjoy finding a needle in a haystack? Do you approach problems by looking at the system as a whole? Do you want to help lead and shape the future of the Internet? Do you like making things blazingly fast? If so, we’d love to hear from you. What you'll do: - Write code and tests, build prototypes, tackle problems, profile and analyze performance bottlenecks - Learn about a wide variety of problems and solutions across a large, complex, and evolving codebase - Use several programming languages (e.g., C++, JavaScript, Kotlin, Rust, Python) and techniques to fix performance issues, with an emphasis on C++ and JavaScript - Help to educate engineers on other teams about writing more performant code through code reviews, giving talks, implementing tooling, and/or writing documentation - Independently define and drive actionable next steps from high level objectives - Work with engineering teams across the organization to assist and lead performance efforts - Shape the future of performance benchmarks, and set the proper priorities for the necessary improvements - Develop strategies for the future of the Performance team and the Organization as a whole - Work with driven, committed team members to help bring the Open Web to millions of people What you'll bring: - BS/MS in CS, CE and 7+ years relevant experience - A mastered understanding of programming in C++ - An understanding of programming in JavaScript - You have proven experience developing performance critical software - You take an experimental and measured approach to solving problems (measurement, and using experiments to diagnose an issue or prove out a solution) - Proven skill in debugging and analyzing performance bottlenecks, and using profiling tools to diagnose and fix issues (VTune, Xperf, other sampling based profilers) - Experience with multithreading and concurrency, disk I/O, GPU - Proven track record of setting team goals and driving them to completion. - Experience motivating and aligning cross-functional teams to deliver on shared goals. - An interest and ability to work in a distributed team (which requires good asynchronous written communication skills as well as good verbal communication skills) Bonus points if you have any of the following: - Familiarity with Web Standards or patterns - Familiarity with Android or Windows OS application programming - A solid understanding of statistics - Prior experience working on a modern web browser We value a variety of voices on the Performance Team and at Mozilla. You don't need to check every box on this list to apply. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: C LI-REMOTE Req ID: R3209 Hiring Ranges: Canada Tier 1 Locations $165,000 - $220,000 CAD Canada Tier 2 Locations $149,000 - $199,000 CAD

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: The Firefox Product Marketing team works closely with Product, Marketing, Creative and other cross-functional partners to drive acquisition, activation, engagement and retention across the entire user journey. The Lifecycle Marketing Operations Manager will serve as the operational anchor for Firefox Mobile marketing execution. They will translate product marketing and growth strategies into reliable, repeatable execution across App Store Optimization (ASO), lifecycle programs, product launches and other priority growth initiatives. They will also improve execution quality and team scalability by developing stronger processes, automation and AI-assisted workflows. What you’ll do: - Coordinate and execute ASO initiatives, including metadata updates, creative experiments and app store events, in collaboration with Product Marketing and our external agency. - Translate approved lifecycle campaign briefs into executable plans and support hands-on campaign execution across key moments in the user journey. - Support the execution of product launches and other priority growth initiatives by coordinating workstreams, cross-functional handoffs and operational follow-through. - Own shared localization, quality assurance and operational readiness workflows across supported workstreams, identifying and escalating blockers and risks before they affect delivery. - Gather and consolidate performance data and operational learnings from campaigns and experiments to support reporting, synthesis and future optimization decisions. - Develop scalable processes, automation and AI-assisted workflows—including solutions using Claude Code and Cowork—to improve execution consistency and reduce coordination overhead. What you’ll bring: - 5+ years of experience in marketing operations or a similar role. - Experience coordinating and executing multi-step marketing programs across multiple workstreams, stakeholders, timelines and dependencies. - Strong operational judgment, organization and attention to detail, with the ability to prioritize effectively and work independently. - Experience creating repeatable processes, workflows and documentation that improve execution quality and efficiency. - Commitment to our values: - Play to win - Build for people first - Engage evidence over ego - Decide and deliver - Ship, learn, repeat What will help you stand out: - Experience with mobile growth or ASO, including metadata optimization and creative experimentation. - Comfort working with performance data, including campaign measurement, experiment analysis and reporting. - Experience building automated and AI-assisted workflows using Claude Code, Cowork, or similar tools. What you’ll get: - Generous performance-based bonus plans for all eligible employees - we share in our success as one team - Rich medical, dental and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country-specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3205 Hiring Ranges: Canada Tier 1 Locations $70,000 - $93,000 CAD Canada Tier 2 Locations $63,000 - $84,000 CAD

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser, and Pocket, a service for keeping up with the best content online. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders - only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: We’re looking for a hands-on Mobile Product Manager with a primary focus on Firefox for iOS, while also contributing across mobile (including Android). This role is about building a better browser, turning downloads into loyal users, and creating experiences that truly stand out. If you’ve shipped mobile apps, obsess over details that improve everyday use, and love turning user insights into real improvements, this is a great opportunity to drive impact at Firefox. What you’ll do: - Build a fundamentally better browser experience: fix bugs, refine UI and navigation, improve downloads, menus, performance, and all the small details that make Firefox noticeably better for users who care about privacy, quality and reliability. - Drive strong activation and retention: focus on the new-user journey, quickly hooking people after they install the app, understanding where they drop off, and relentlessly optimizing the funnel through data, testing and iteration. - Deliver differentiating features and experiences that make Firefox stickier for key user groups, the kinds of things others can’t or won’t build. - Work closely with engineers, designers, data science and TPMs to ship high-impact improvements while balancing user needs, technical constraints, privacy and performance goals. - Stay deeply connected to real users: track App Store trends and discussions, test apps hands-on, analyze reviews and analytics, and turn those insights into concrete enhancements for Firefox on iOS and Android. - Monitor app health in App Store Connect and Google Play Console (crashes, ANRs, ratings) and support acquisition/retention efforts through ASO, store listings and growth experiments. - Adapt and optimize Firefox for global markets (Europe, Japan, Asia etc.), keeping cultural differences and local realities like data constraints in mind. What you'll bring: - Proven Shipping Experience: Hands-on experience launching or managing apps on the iOS App Store and/or Google Play Store, with clear impact on user experience and metrics. - Execution Focus: A strong track record of delivering features and improvements under deadlines through effective collaboration with engineering, design and cross-functional partners. - Mobile & Browser Fluency: Deep understanding of iOS (and ideally Android) ecosystems, app store policies and web browser technologies, with genuine passion for what makes a great browsing experience. - Data-Driven Iteration: Comfort using analytics, funnels, A/B testing and user feedback to improve activation, retention and overall product quality. - User Obsession: Natural habit of studying apps, following trends on platforms like X/Twitter and Reddit, and testing experiences yourself to uncover opportunities. - Global & Growth Mindset: Interest or experience growing products in international markets with sensitivity to local user needs. - Bonus: - Experience with mobile browsers or privacy-focused products. - History of meaningfully scaling an app’s user base. - Currently maintaining your own side project or app on the App Store or Google Play. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3128 Hiring Ranges: Remote Belgium €56.000 - €74.000 EUR

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net The opportunity The Senior Software Engineer, iOS is an experienced individual contributor who brings deep iOS expertise to the design, development, and evolution of Thunderbird’s iOS application. This role will continue to contribute to Thunderbirds effort to develop the iOS app and establish a strong technical foundation for the product. You’ll work closely with mobile engineers, product management, UX, and other partners to deliver a high-quality iOS experience that meets high standards for performance, reliability, accessibility, security, and maintainability. You’ll play an important role in delivering exceptional user experiences for Thunderbird’s global user base by translating product needs into thoughtful technical solutions and ensuring your work aligns with MZLA’s mission and the objectives of the Thunderbird Project. You’ll also collaborate with open-source contributors and mobile engineers across the broader Mozilla ecosystem. What you’ll do - Build and refine Thunderbird’s mobile products and platform architecture. - Improve scalability, performance, reliability, and user experience. - Develop a deep understanding of the codebase and architecture to confidently make changes across the entire stack. - Maintain strong debugging and testing practices across unit, integration, and automated testing. - Review code and guide improvements to architecture, testing, and development best practices. - Independently resolve complex issues involving performance, security, and cross-platform integration. - Monitor application health and address issues before they escalate. - Document technical decisions, system architecture, and team processes. - Own assigned projects, collaborating cross-functionally, from investigation and planning through development, validation, and delivery. - Ensure mobile development meets accessibility, security, and privacy standards. What you bring - 7+ years of professional software development experience, including 2+ years in a Senior Software Engineer role. - 3+ years of professional mobile application development experience. - Strong experience with Swift, SwiftUI, and iOS frameworks. - Deep knowledge of iOS architecture, design patterns, and performance optimization. - Experience delivering and maintaining complex, scalable, and reliable software. - Experience addressing technical debt and refactoring large or complex codebases. - Strong knowledge of mobile security, including encryption, secure storage, app signing, and vulnerability remediation. - Experience with communication and email protocols such as RSS, IMAP, POP, or Matrix, and familiarity with the IETF standards for CalDav or CardDav. - Advanced proficiency with Git and collaborative development workflows. - Strong debugging, testing, and problem-solving skills. - Strong attention to detail, curiosity, and a product-focused mindset. - The ability to work independently, take ownership, and collaborate across teams. - Respect for diverse skills, experiences, and perspectives. - Excellent async written communication skills; comfortable working with a geographically distributed team. - Ability to learn, evaluate, and responsibly use emerging technologies, including AI-enabled tools, to improve work processes. Bonus points for - Familiarity with Apple App Store and Google Play Store compliance guidelines. - Experience contributing to open-source projects or communities. - Proficiency in French, German, Japanese, or another widely supported Thunderbird language. What success looks like You’ll be successful in this role if you look beyond shipping features and improve the architecture, reliability, security, and long-term health of the product. You’re comfortable solving ambiguous problems, flagging risks early, documenting decisions, and collaborating across engineering, product, UX, users, and the open-source community. Over time, your work will help Thunderbird’s iOS experience become more resilient, scalable, and easier for both staff and community contributors to build on. Work environment This is a full-time, fully remote position. You’ll join a distributed team of Thunderbird staff, open-source community members, and contributors from around the world. We rely on clear communication, thoughtful documentation, and collaborative decision-making to work effectively across time zones and disciplines. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - US: $123,000 - $144,000 USD - Canada: $108,000 - $125,000 CAD We may consider candidates with strong skills but less than the required experience. Title, level and compensation will be determined based on qualifications and experience. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - 401(k) / RRSP co ntributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation.

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net and www.thunderbolt.io The opportunity MZLA is entering a new phase of growth as we bring Thunderbird, Thunderbolt, and other current and future products and services into the enterprise market. Our enterprise approach will be partner-led, with external partners leading sales, implementation, and ongoing customer relationships while MZLA provides the products, technical expertise, and subject-matter knowledge needed for success. Our move into the enterprise market is being shaped in part by growing interest in digital sovereignty, particularly in Europe , where enterprises and public-sector organizations are placing greater emphasis on control over data and infrastructure, deployment flexibility, privacy, security, interoperability, and reduced vendor dependence. We are looking for a Senior Lead, Enterprise Partnerships & Strategy to add dedicated partnership and commercial expertise to work already underway . You will partner closely with the CEO, senior leadership, and cross-functional teams to shape MZLA’s enterprise strategy, evaluate opportunities, develop partnership and commercial models, shape pricing and packaging, and advance a cohesive enterprise offering across our products and services. This is a hands-on role in a lean environment. Success will require someone who can operate credibly with senior leaders and external partners while remaining closely involved in the analysis, preparation, coordination, negotiation, and follow-through needed to move opportunities forward and build a more repeatable enterprise approach. This role requires regular working-hour overlap with colleagues in North American time zones, as well as flexibility to meet with partners and stakeholders across Europe. This role will also include periodic travel, including international, to meet with partners, prospective customers and represent MZLA at relevant industry events. What you’ll do - Help define and execute an enterprise strategy across MZLA’s products and services. - Translate digital sovereignty priorities into clear enterprise and partnership requirements. - Identify, evaluate, and advance enterprise opportunities and strategic partnerships, particularly in Europe and other sovereignty-focused markets. - Work with stakeholders to clarify roles across MZLA, external partners, and other Mozilla entities. - Develop pricing, packaging, licensing, reseller, revenue-sharing, support, implementation, and other commercial models. - Lead or support partner negotiations and senior-level commercial discussions. - Work closely with product and engineering teams to understand capabilities, deployment options, integrations, security and privacy considerations, support requirements, and roadmap dependencies. - Translate technical capabilities into clear enterprise propositions and partner plans. - Build practical processes and decision frameworks that support repeatable execution and help ensure external commitments remain realistic and supportable. What you bring - 15+ years of relevant professional experience, including substantial experience in product or strategic partnerships, enterprise strategy, commercial strategy, or technical business development. - Experience building a new partnership, enterprise, platform, or commercial capability in a partner-led environment. - Experience working with European enterprises, public-sector organizations, regulated institutions, technology partners, or similarly complex stakeholders. - Strong understanding of digital sovereignty and the commercial, technical, regulatory, legal, and procurement considerations shaping technology decisions in Europe. - Experience working through resellers, systems integrators, implementation partners, or similar partner-led enterprise models. - Demonstrated experience developing and negotiating pricing, packaging, licensing, reseller, revenue-sharing, implementation, support, or similar commercial models, with strong judgment around enterprise buying processes, deal economics, negotiation strategy, and complex procurement. - Experience with technically complex software products, platforms, infrastructure, AI-enabled systems, communications technology, security, or privacy technology, with the technical and product fluency to work credibly with engineering, product, partner, and enterprise stakeholders. - Strong executive communication, relationship-management, facilitation, and negotiation skills. - Ability to bring structure to ambiguous opportunities and move comfortably between strategy and detailed execution. - A collaborative, low-ego working style and the ability to influence without formal authority. - Strong alignment with Mozilla’s mission and values, including openness, privacy, user agency, trust, and long-term sustainability. - Ability and willingness to travel periodically, including internationally. Bonus points for - Experience with on-premises, self-hosted, private-cloud, in-region, or other customer-controlled deployment models. - Experience with open-source software, open standards, or open technology ecosystems. - Familiarity with AI-enabled software, enterprise search, knowledge systems, communications platforms, productivity tools, or privacy-oriented technology. - Experience building partnerships or enterprise initiatives in an early-stage company, new business unit, or newly established function. - Experience coordinating partnerships across affiliated organizations or a portfolio of related products. About you You are a strategic thinker who is equally comfortable working in the details. You know that successful partnerships depend on more than strong relationships: they require sound product judgment, clear commercial models, technical credibility, and disciplined execution. You understand that enterprise technology decisions are shaped not only by features and price, but also by control, jurisdiction, trust, interoperability, and long-term technology dependence. You can translate those considerations into practical enterprise and partnership strategies without overstating what a product or organization can deliver. You are comfortable representing an organization in senior external conversations while remaining hands-on with pricing, preparation, technical dependencies, coordination, and follow-through. You are motivated by building a durable enterprise capability in a lean environment rather than inheriting a mature program or immediately building a large team. Work environment This is a full-time, fully remote position. You’ll work with colleagues, partners, and customers across multiple countries and time zones, so strong communication and documentation skills are essential. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - US : $175,000–$220,000 USD - Canada: $140,000-$180,000 CAD This is a salaried, non-commissioned role and is eligible for MZLA’s annual discretionary bonus program. The salary range shown reflects the intended level and scope of the position. We may consider candidates with strong relevant skills but less experience, in which case title, level, and compensation may be adjusted accordingly. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - 401(k) / RRSP contributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation. LI-DNI

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net and www.thunderbolt.io. The opportunity Thunderbolt is an open-source, cross-platform AI product initiative from the team behind Thunderbird. It is being built around a clear principle: people and organizations should be able to use AI while staying in control of their data, infrastructure, model choices, and long-term options. Thunderbolt is designed to support flexible deployment models, integrations with AI tools and workflows, and use cases across desktop, web, and mobile. We are looking for a Senior Engineering Manager to lead engineering execution, people management, and operating practices for Thunderbolt as it moves from R&D incubation into a more mature product and enterprise development phase . This role will help the team define what production-ready means at this stage: stronger release discipline, clearer ownership, higher user-facing product quality, stronger engineering practices, and a more scalable operating model. This is a hands-on technical management role for a seasoned engineering leader who has helped early-stage products become reliable, production-ready, and enterprise-ready. You will manage and grow a small senior engineering team, stay close to code quality and technical execution , and partner closely with product and technical leadership to turn an open-source, privacy-respecting AI product into something organizations can deploy with confidence. We are looking for someone who has seen this stage before: a promising early product, a small senior team, real enterprise interest, incomplete process, and the need to move quickly without creating fragile systems or one-off customer work. What you’ll do - Lead engineering execution by clarifying priorities, ownership, timelines, risks, dependencies, and quality expectations. - Manage engineers and contractors, including coaching, feedback, prioritization, performance support, and team development. - Stay close to the codebase by contributing code, reviewing technical work, evaluating tradeoffs, and helping the team maintain momentum and quality. - Partner with technical and product leadership to turn product direction, AI strategy, user experience goals, and technical priorities into coordinated engineering plans. - Establish planning, review, release, and follow-through practices that improve predictability and reduce bottlenecks. - Maintain high standards for code quality, testing, documentation, reliability, security awareness, maintainability, and release readiness. - Build strong product and architectural context across AI-enabled workflows, integrations, local-first or customer-controlled architectures, and release requirements. - Partner across product, design, enterprise-facing teams, and technical leadership to balance speed, user experience, privacy, quality, enterprise readiness, and long-term sustainability. - Lead hiring, onboarding, and resource planning as the Thunderbolt engineering team grows. - Help Thunderbolt scale from an incubation-stage product into a reliable, enterprise-ready open-source AI product. What you bring - 15+ years of professional software development experience, including significant experience in senior engineering leadership or complex product delivery roles. - 5+ years of experience managing technical teams, including senior engineers or senior individual contributors. - A track record of leading a team that shipped polished, top-tier products held to a genuine standard of craft. - Strong ability to translate ambiguous product and technical direction into clear plans, ownership models, and delivery momentum. - Technical fluency with AI-enabled products, including the ability to evaluate tradeoffs across areas such as LLM applications, RAG workflows, agents, enterprise search, automation, on-device AI, or AI evaluation. - Demonstrated experience delivering complex applications across multiple platforms, such as desktop, web, and mobile, using technologies such as Tauri, Electron, React Native, or comparable frameworks. - Experience with enterprise software, regulated environments, or similarly complex technical products, including security, privacy, compliance readiness, administration, integrations, and customer-controlled deployment models. - Practical experience with local-first, offline-capable, self-hosted, hybrid, on-premise, air-gapped, or other customer-controlled product architectures, including tradeoffs related to data storage, sync, privacy, reliability, and user experience. - Experience improving engineering practices related to technical planning, code review, release readiness, testing, documentation, CI/CD, maintainability, or technical debt management. - Excellent communication skills around technical prioritization, release risk, ownership, quality expectations, and tradeoffs. Bonus points for - Experience working in open-source or maintainer-style engineering environments. - Experience with compliance or security standards such as SOC 2, HIPAA, ISO 27001, or similar frameworks. - Experience helping take a product from zero to one in a startup or new product initiative. What success looks like Success in this role means helping Thunderbolt make the leap from promising R&D-stage product to a production-ready, enterprise-grade open-source AI product that security-conscious organizations can deploy with confidence . Within the first year, the Senior Engineering Manager should help turn a fast-moving early product into a team and engineering system that can scale by helping the team: - Define what “production-ready” means for Thunderbolt and consistently meet that bar. - Create the clarity, ownership, and release confidence the team needs to ship quickly and sustainably. - Raise the quality of the user-facing product experience while protecting codebase health, maintainability, privacy, and security. - Build the lightweight structure needed for a senior team to do its best work without slowing down experimentation. - Help build Thunderbolt for global scale, enterprise adoption, and real-world impact! Work environment This is a full-time , fully remote position. You’ll work with our passionate staff, open-source community members and partners from all over the globe. Strong communication and documentation skills are essential for effective collaboration across time zones and disciplines. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - US : $215,000 - $240,000 USD In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - 401(k) contributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation. LI-REMOTE

To learn the Hiring Ranges for this position, please select your location from the Apply Now dropdown menu. To learn more about our Hiring Range System, please click this link. Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we're shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we're doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren't beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: This role is part of the Governance, Risk & Compliance (GRC) function within Mozilla's Security team. The Security team supports Product, Enterprise, and GRC functions across the organization, aligned with the mission to build a safe and secure internet. This role is responsible for maintaining and advancing Mozilla's Information Security Management System (ISMS) and supporting our ISO 27001 and SOC 2 Type 2 compliance programs — from policy and control design through audit readiness and certification. The ideal candidate has hands-on experience across the full breadth of a compliance program, is comfortable building process where none yet exists, and works well with a wide range of cross-functional stakeholders. What you'll do: - Maintain and mature the ISMS, including the Statement of Applicability (SoA), risk treatment plans, and the Management Review Meeting (MRM) process and cadence. - Support ISO 27001 and SOC 2 Type 2 audit execution—helping determine scope, preparing evidence and narrative artifacts, participating in auditor interviews and walkthroughs, and resolving auditor findings. - Contribute to the SOC 2 System Description and other audit-specific narrative documentation, ensuring they accurately reflect the organization's actual control environment. - Track gaps and remediation efforts arising from readiness assessments and audits. - Lead the policy program—driving policy creation, revision, and cross-functional review cycles to keep the security policy set current, enforceable, and audit-ready. - Support compliance scaling as additional products or business units pursue readiness assessments and certification. - Support the internal audit function, partnering with internal or third-party resources as needed to meet ISO 27001's internal audit requirements. - Partner closely with Engineering, IT, Legal, Privacy, People teams, and product leadership to gather evidence, drive control ownership, and translate compliance requirements into practical, adoptable practices. - Advise the GRC manager and broader Security leadership on audit risk, certification readiness, and compliance program strategy. What you'll bring: - 5 years of experience in information security, GRC, or compliance-focused roles. - Deep familiarity with ISO 27001 and SOC 2 Trust Services Criteria, gained through meaningful involvement in audits from readiness through certification. - Comfort operating across the full breadth of an ISMS—SoA maintenance, Management Review Meetings, and System Description authorship. - Demonstrated experience writing and revising security policies, including running cross-functional review cycles to gain organization-wide buy-in and adoption. - Experience tracking gaps and remediation plans and connecting that work to an organization's broader compliance and risk program. - Excellent cross-functional collaboration skills—comfortable working with engineers, product managers, legal, and executive stakeholders, and able to translate compliance requirements into practical, actionable workflows. - Ability to ramp up quickly and operate with a high degree of independence. - Comfort building processes where none yet exist. - Strong written and verbal communication skills; ability to represent Mozilla credibly and confidently in front of external auditors. - Relevant industry certifications (e.g., CISA, CISSP, ISO 27001 Lead Auditor/Implementer) are a plus. Commitment to our values: - Welcoming differences - Being relationship-minded - Practicing responsible participation - Having grit What you'll get: - Generous performance-based bonus plans to all eligible employees—we share in our success as one team. - Rich medical, dental, and vision coverage. - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute). - Quarterly all-company wellness days where everyone takes a pause together. - Country-specific holidays plus a day off for your birthday. - One-time home office stipend. - Annual professional development budget. - Quarterly well-being stipend. - Considerable paid parental leave. - Employee referral bonus program. - Other benefits (life/AD&D, disability, EAP, etc.—varies by country). About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: C LI-DNI Req ID: R3197

To learn the Hiring Ranges for this position, please select your location from the Apply Now dropdown menu. To learn more about our Hiring Range System, please click this link. Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: At Mozilla, our Release Engineering team (RelEng) plays a crucial role in ensuring the seamless and reliable delivery of our world-class software products. As a key part of our engineering infrastructure, RelEng is responsible for the continuous deployment of our products, ensuring they reach our users efficiently and without interruption. For instance, we can reliably ship a security fix to > 200M users across different platforms and > 100 locales in under 24 hours. RelEng has an expertise in configuring and optimizing our build and deployment pipeline. In order to provide a faster and more reliable experience for Firefox developers, RelEng is looking for an engineer who can help optimize and maintain the pipeline. If you are passionate about release automation, the Release Engineering team at Mozilla is the place for you. Join us and be a part of a team that is making a significant impact on the web and beyond. What you’ll do: - Write software that scales - tens of thousands of tasks are run to build, test, and release Firefox every single day - Collaborate with senior+ engineers to improve the developers’ experience, then implement the improvements. - Work with a geographically-distributed development team between North America and Europe - Collaborate with others by requesting and providing code reviews - Respond to critical service outages (during normal working hours - no on call rotation is required) What you’ll bring: - You have a Bachelor's degree in computer science (or related programs) or equivalent work experience - You have a minimum of 2 years of experience working in an object-oriented programming (OOP) language (preferably Python) - You are passionate about CI/CD pipelines - You have some previous experience on using cloud resources (e.g. on AWS, GCP, or Azure) - You feel comfortable developing in Windows, macOS, and Linux environments, experience with shell scripting - You have worked on a team distributed across time zones - You enjoy getting familiar and improving existing code bases and tools - Commitment to our values: - Welcoming differences - Being relationship-minded - Practicing responsible participation - Having grit What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: E LI-DNI Req ID: R3182

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: At Mozilla, we believe the internet is a global public resource—open and accessible to all. As a Security Engineer, you'll protect that vision by building, breaking, and hardening products that put people’s privacy and safety first. We are looking for a security engineer to own, manage and administer the Mozilla Web Bug Bounty program and work with Mozilla product and SIRT teams to ensure risk mitigation of security incidents and events. What you’ll do: - Own and scale Mozilla’s web bug bounty program, including strategy, prioritization, KPIs, and continuous improvement - Act as the primary interface with external researchers and platforms (e.g., HackerOne), fostering a high-quality and trusted research community - Lead triage and technical validation of incoming reports across multiple intake channels (HackerOne, Bugzilla, email) - Drive end-to-end vulnerability remediation, partnering with engineering teams to ensure timely, effective fixes - Identify root causes and systemic issues, and influence long-term improvements in secure development practices - Collaborate with the Security Incident Response Team (SIRT) on active incidents and post-incident reviews - Perform targeted code reviews (primarily JavaScript and Python) during investigations and high-risk changes - Develop or leverage tooling to improve triage efficiency, signal quality, and program insights What you’ll bring: - 3+ years of demonstrated ability in a security engineering role. - Experience operating bug bounty programs, including enhancements, automation and scaling, and/or bug hunting - Practical experience working with modern cloud technologies (eg. Amazon Web Services, Google Cloud Platform, Heroku, Microsoft Azure, etc.) - Experience analyzing code and systems to move from vulnerability → root cause → prevention - Real-world experience in software development and/or engineering operations - Ability to develop your own tools as needed in a variety of programming languages (eg. Python, Go, Rust, Javascript, etc.) is a plus, but not required. - Strong communication, collaboration, and problem-solving skills, with the ability to influence and guide cross-functional teams. - Formal credentials are great, but real-world experience, curiosity, passion and a growth mindset matter more. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3105 Hiring Ranges: Remote UK £66,000 - £87,000 GBP

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net and www.thunderbolt.io The opportunity MZLA is entering a new phase of growth as we bring Thunderbird, Thunderbolt, and other current and future products and services into the enterprise market. Our enterprise approach will be partner-led, with external partners leading sales, implementation, and ongoing customer relationships while MZLA provides the products, technical expertise, and subject-matter knowledge needed for success. Our move into the enterprise market is being shaped in part by growing interest in digital sovereignty, particularly in Europe , where enterprises and public-sector organizations are placing greater emphasis on control over data and infrastructure, deployment flexibility, privacy, security, interoperability, and reduced vendor dependence. We are looking for a Senior Lead, Enterprise Partnerships & Strategy to add dedicated partnership and commercial expertise to work already underway . You will partner closely with the CEO, senior leadership, and cross-functional teams to shape MZLA’s enterprise strategy, evaluate opportunities, develop partnership and commercial models, shape pricing and packaging, and advance a cohesive enterprise offering across our products and services. This is a hands-on role in a lean environment. Success will require someone who can operate credibly with senior leaders and external partners while remaining closely involved in the analysis, preparation, coordination, negotiation, and follow-through needed to move opportunities forward and build a more repeatable enterprise approach. This role requires regular working-hour overlap with colleagues in North American time zones, as well as flexibility to meet with partners and stakeholders across Europe. This role will also include periodic travel, including international, to meet with partners, prospective customers and represent MZLA at relevant industry events. What you’ll do - Help define and execute an enterprise strategy across MZLA’s products and services. - Translate digital sovereignty priorities into clear enterprise and partnership requirements. - Identify, evaluate, and advance enterprise opportunities and strategic partnerships, particularly in Europe and other sovereignty-focused markets. - Work with stakeholders to clarify roles across MZLA, external partners, and other Mozilla entities. - Develop pricing, packaging, licensing, reseller, revenue-sharing, support, implementation, and other commercial models. - Lead or support partner negotiations and senior-level commercial discussions. - Work closely with product and engineering teams to understand capabilities, deployment options, integrations, security and privacy considerations, support requirements, and roadmap dependencies. - Translate technical capabilities into clear enterprise propositions and partner plans. - Build practical processes and decision frameworks that support repeatable execution and help ensure external commitments remain realistic and supportable. What you bring - 15+ years of relevant professional experience, including substantial experience in product or strategic partnerships, enterprise strategy, commercial strategy, or technical business development. - Experience building a new partnership, enterprise, platform, or commercial capability in a partner-led environment. - Experience working with European enterprises, public-sector organizations, regulated institutions, technology partners, or similarly complex stakeholders. - Strong understanding of digital sovereignty and the commercial, technical, regulatory, legal, and procurement considerations shaping technology decisions in Europe. - Experience working through resellers, systems integrators, implementation partners, or similar partner-led enterprise models. - Demonstrated experience developing and negotiating pricing, packaging, licensing, reseller, revenue-sharing, implementation, support, or similar commercial models, with strong judgment around enterprise buying processes, deal economics, negotiation strategy, and complex procurement. - Experience with technically complex software products, platforms, infrastructure, AI-enabled systems, communications technology, security, or privacy technology, with the technical and product fluency to work credibly with engineering, product, partner, and enterprise stakeholders. - Strong executive communication, relationship-management, facilitation, and negotiation skills. - Ability to bring structure to ambiguous opportunities and move comfortably between strategy and detailed execution. - A collaborative, low-ego working style and the ability to influence without formal authority. - Strong alignment with Mozilla’s mission and values, including openness, privacy, user agency, trust, and long-term sustainability. - Ability and willingness to travel periodically, including internationally. Bonus points for - Experience with on-premises, self-hosted, private-cloud, in-region, or other customer-controlled deployment models. - Experience with open-source software, open standards, or open technology ecosystems. - Familiarity with AI-enabled software, enterprise search, knowledge systems, communications platforms, productivity tools, or privacy-oriented technology. - Experience building partnerships or enterprise initiatives in an early-stage company, new business unit, or newly established function. - Experience coordinating partnerships across affiliated organizations or a portfolio of related products. About you You are a strategic thinker who is equally comfortable working in the details. You know that successful partnerships depend on more than strong relationships: they require sound product judgment, clear commercial models, technical credibility, and disciplined execution. You understand that enterprise technology decisions are shaped not only by features and price, but also by control, jurisdiction, trust, interoperability, and long-term technology dependence. You can translate those considerations into practical enterprise and partnership strategies without overstating what a product or organization can deliver. You are comfortable representing an organization in senior external conversations while remaining hands-on with pricing, preparation, technical dependencies, coordination, and follow-through. You are motivated by building a durable enterprise capability in a lean environment rather than inheriting a mature program or immediately building a large team. Work environment This is a full-time, fully remote position. You’ll work with colleagues, partners, and customers across multiple countries and time zones, so strong communication and documentation skills are essential. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - US : $175,000–$220,000 USD This is a salaried, non-commissioned role and is eligible for MZLA’s annual discretionary bonus program. The salary range shown reflects the intended level and scope of the position. We may consider candidates with strong relevant skills but less experience, in which case title, level, and compensation may be adjusted accordingly. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - 401(k) contributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation. LI-DNI

To learn the Hiring Ranges for this position, please select your location from the Apply Now dropdown menu. To learn more about our Hiring Range System, please click this link. Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: The Firefox Product Marketing team works closely with Product, Marketing, Creative and other cross-functional partners to drive acquisition, activation, engagement and retention across the entire user journey. The Lifecycle Marketing Operations Manager will serve as the operational anchor for Firefox Mobile marketing execution. They will translate product marketing and growth strategies into reliable, repeatable execution across App Store Optimization (ASO), lifecycle programs, product launches and other priority growth initiatives. They will also improve execution quality and team scalability by developing stronger processes, automation and AI-assisted workflows. What you’ll do: - Coordinate and execute ASO initiatives, including metadata updates, creative experiments and app store events, in collaboration with Product Marketing and our external agency. - Translate approved lifecycle campaign briefs into executable plans and support hands-on campaign execution across key moments in the user journey. - Support the execution of product launches and other priority growth initiatives by coordinating workstreams, cross-functional handoffs and operational follow-through. - Own shared localization, quality assurance and operational readiness workflows across supported workstreams, identifying and escalating blockers and risks before they affect delivery. - Gather and consolidate performance data and operational learnings from campaigns and experiments to support reporting, synthesis and future optimization decisions. - Develop scalable processes, automation and AI-assisted workflows—including solutions using Claude Code and Cowork—to improve execution consistency and reduce coordination overhead. What you’ll bring: - 5+ years of experience in marketing operations or a similar role. - Experience coordinating and executing multi-step marketing programs across multiple workstreams, stakeholders, timelines and dependencies. - Strong operational judgment, organization and attention to detail, with the ability to prioritize effectively and work independently. - Experience creating repeatable processes, workflows and documentation that improve execution quality and efficiency. - Commitment to our values: - Play to win - Build for people first - Engage evidence over ego - Decide and deliver - Ship, learn, repeat What will help you stand out: - Experience with mobile growth or ASO, including metadata optimization and creative experimentation. - Comfort working with performance data, including campaign measurement, experiment analysis and reporting. - Experience building automated and AI-assisted workflows using Claude Code, Cowork, or similar tools. What you’ll get: - Generous performance-based bonus plans for all eligible employees - we share in our success as one team - Rich medical, dental and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country-specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-DNI Req ID: R3205

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: This contract recruiter (Duration: approx 6 months) will help grow Mozilla’s global recruiting effort for various Mozilla products. You are joining a team and company at a time of growth and transformation. You will love being surrounded by people who are as passionate as you are about doing their part to make technology, their community, and the world a better place for ALL. What you’ll do: - Partner with hiring managers to understand their talent needs and develop effective recruitment strategies. - Be a strategic advisor to hiring managers, providing insight and direction to ensure we are being proactive and creative in how we attract a diverse pool of qualified applicants - Source, screen, and evaluate candidates using a variety of channels, including HireEz, LinkedIn, applications and referrals. - Conduct detailed screenings to assess technical skills, culture add, and potential for success within Mozilla Corporation. - Manage the full cycle recruitment process, from job posting to offer acceptance. - Foster the growth of a diverse pool of candidates to attract a variety of skilled professionals. - Collaborate with cross-functional teams like compensation, PBPs, legal, and finance. - Use data and analytics to make informed decisions and improve recruitment strategies. What you’ll bring: - 5+ years of proven experience as a full-cycle technical recruiter in the technical industry. - Proficiency in sourcing techniques and tools. - Ability to assess technical skills and evaluate candidates. - Experience with applicant tracking systems (Greenhouse preferred). - Proficiency in using data and analytics to optimize recruitment strategies. - Ability to excel in ambiguous situations for rapidly evolving tech organization - Commitment to our values: - Welcoming differences - Being relationship-minded - Practicing responsible participation - Having grit About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net The opportunity Thunderbird is growing beyond our free desktop and mobile applications, and we’re looking for a Senior Privacy & Compliance Program Manager to help build and strengthen the privacy, compliance, data governance, and vendor review practices that support MZLA’s products and operations. Privacy and compliance are central to how we build and maintain user trust, particularly for a global user base with a significant presence in Europe. As MZLA expands its products and services, this role will help ensure that data is collected, used, shared, retained, and governed responsibly, in line with Thunderbird’s values and user trust commitments. You will help translate privacy, security, and compliance requirements into practical processes that fit our products and services, infrastructure, support workflows, vendor ecosystem, and operating model. MZLA is a small, growing organization, and the right person will be a hands-on program manager who can create structure without overcomplicating the work. You will work across legal, engineering, product, support, finance, operations, and other Mozilla-wide partners to clarify ownership, track open items, identify when issues need escalation, and keep cross-functional privacy and compliance work moving. This role requires strong judgment, excellent follow-through, and the ability to operate across legal, technical, operational, and leadership contexts. You will help ensure privacy and compliance work is well coordinated, appropriately documented, and grounded in practical processes that support user trust and responsible product development. This role requires regular overlap with Eastern Time working hours for meetings, collaboration, and time-sensitive coordination. We welcome candidates in other time zones who can consistently maintain meaningful overlap with ET. What you’ll do - Coordinate MZLA’s privacy and compliance program work, including planning, recurring reviews, risk tracking, documentation, and leadership reporting. - Translate privacy, security, and compliance requirements into practical processes that fit how MZLA works. - Coordinate vendor and tool reviews with legal, engineering, product, support, finance, operations, and other stakeholders. - Help document data flows, subprocessors, and privacy, security, contractual, and operational considerations. - Support privacy operations and data governance for a global user base, including DSAR and privacy-rights workflows. - Help develop and maintain practical data inventories, records of processing, retention practices, and privacy-related documentation. - Partner with technical teams to support privacy-by-design practices for new products, services, tools, and data-processing activities. - Support compliance and audit-readiness efforts, including ISO-related readiness, evidence tracking, access reviews, and remediation follow-up. - Help strengthen incident response readiness by clarifying roles, escalation paths, documentation expectations, and coordination needs. - Build lightweight guidance, checklists, templates, and training materials that help teams meet privacy and compliance expectations without creating unnecessary bureaucracy. What you bring - 8+ years of relevant professional experience, preferably within a software, SaaS, technology, or technical product environment. - 5+ years of direct or closely related hands-on experience in privacy operations, compliance program management, GRC, legal operations, security compliance, vendor governance, data governance, or a similar function. - Experience coordinating cross-functional programs across legal, engineering, product, support, finance, and operations teams, including work with external counsel, advisors, auditors, consultants, or vendors to move complex work forward. - Experience supporting vendor, tool, or subprocessor reviews, including privacy, security, legal, and operational risk considerations. - Experience supporting privacy operations, data governance, or user-rights workflows for products or services with international users, including areas such as GDPR or EU privacy requirements, DSARs, deletion or export requests, data inventories, records of processing, retention, access controls, or privacy policy maintenance. - Technical fluency and the ability to work with technical teams to understand how data moves through systems, including cloud services, vendor tools, support systems, logs, telemetry, authentication, access permissions, and data storage. - Familiarity with incident response, breach readiness, or security/privacy escalation processes. - Strong project and program management skills, excellent written communication, sound judgment, and the ability to build pragmatic, right-sized processes for a small but growing organization. - Ability to learn, evaluate, and responsibly use emerging technologies, including AI-enabled tools, to improve work processes. - Ability to operate with initiative in areas where processes are still evolving, including identifying stakeholders, proposing next steps, clarifying ownership, and knowing when to escalate. Bonus points for - Experience supporting ISO 27001 readiness, SOC 2 readiness, audits, certifications, or similar compliance efforts. - Experience working in an open-source, consumer software, communications, email, privacy-focused, or mission-driven technology organization. - Experience developing training or enablement materials for privacy, security, compliance, vendor review, or data handling. - Experience with GRC platforms, policy management tools, ticketing systems, vendor management tools, or other systems used to track compliance workflows. - Privacy certification such as CIPP/E, CIPP/US, CIPM, or similar. What success looks like Success in this role means privacy and compliance work is clear, coordinated, and easier for teams to execute. You will help create practical processes, documentation, ownership, and escalation paths for vendor reviews, DSAR workflows, data governance, and compliance readiness. Over time, your work will strengthen user trust, reduce operational risk, and help MZLA scale its products and services without adding unnecessary bureaucracy. Work environment You’ll work with our passionate staff, external partners, and open-source community members from around the world to support the mission and objectives of Thunderbird. This is a remote, full-time position that requires strong communication, documentation, and follow-through. Because this role works across legal, technical, operational, and leadership contexts, you should be comfortable collaborating across time zones and disciplines through video meetings, shared documents, issue trackers, and asynchronous communication. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - US: $115,000 - $145,000 We may consider candidates with a range of relevant experience. Final title, level, and compensation will be determined based on qualifications, experience, and role scope. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - 401(k) contributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation. LI-DNI

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: The Firefox Product Marketing team works closely with Product, Marketing, Creative and other cross-functional partners to drive acquisition, activation, engagement and retention across the entire user journey. The Lifecycle Marketing Operations Manager will serve as the operational anchor for Firefox Mobile marketing execution. They will translate product marketing and growth strategies into reliable, repeatable execution across App Store Optimization (ASO), lifecycle programs, product launches and other priority growth initiatives. They will also improve execution quality and team scalability by developing stronger processes, automation and AI-assisted workflows. What you’ll do: - Coordinate and execute ASO initiatives, including metadata updates, creative experiments and app store events, in collaboration with Product Marketing and our external agency. - Translate approved lifecycle campaign briefs into executable plans and support hands-on campaign execution across key moments in the user journey. - Support the execution of product launches and other priority growth initiatives by coordinating workstreams, cross-functional handoffs and operational follow-through. - Own shared localization, quality assurance and operational readiness workflows across supported workstreams, identifying and escalating blockers and risks before they affect delivery. - Gather and consolidate performance data and operational learnings from campaigns and experiments to support reporting, synthesis and future optimization decisions. - Develop scalable processes, automation and AI-assisted workflows—including solutions using Claude Code and Cowork—to improve execution consistency and reduce coordination overhead. What you’ll bring: - 5+ years of experience in marketing operations or a similar role. - Experience coordinating and executing multi-step marketing programs across multiple workstreams, stakeholders, timelines and dependencies. - Strong operational judgment, organization and attention to detail, with the ability to prioritize effectively and work independently. - Experience creating repeatable processes, workflows and documentation that improve execution quality and efficiency. - Commitment to our values: - Play to win - Build for people first - Engage evidence over ego - Decide and deliver - Ship, learn, repeat What will help you stand out: - Experience with mobile growth or ASO, including metadata optimization and creative experimentation. - Comfort working with performance data, including campaign measurement, experiment analysis and reporting. - Experience building automated and AI-assisted workflows using Claude Code, Cowork, or similar tools. What you’ll get: - Generous performance-based bonus plans for all eligible employees - we share in our success as one team - Rich medical, dental and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country-specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3205 Hiring Ranges: US Tier 1 Locations $102,000 - $116,000 USD US Tier 2 Locations $94,000 - $125,000 USD US Tier 3 Locations $87,000 - $99,000 USD

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net The opportunity The Senior Software Engineer, iOS is an experienced individual contributor who brings deep iOS expertise to the design, development, and evolution of Thunderbird’s iOS application. This role will continue to contribute to Thunderbirds effort to develop the iOS app and establish a strong technical foundation for the product. You’ll work closely with mobile engineers, product management, UX, and other partners to deliver a high-quality iOS experience that meets high standards for performance, reliability, accessibility, security, and maintainability. You’ll play an important role in delivering exceptional user experiences for Thunderbird’s global user base by translating product needs into thoughtful technical solutions and ensuring your work aligns with MZLA’s mission and the objectives of the Thunderbird Project. You’ll also collaborate with open-source contributors and mobile engineers across the broader Mozilla ecosystem. What you’ll do - Build and refine Thunderbird’s mobile products and platform architecture. - Improve scalability, performance, reliability, and user experience. - Develop a deep understanding of the codebase and architecture to confidently make changes across the entire stack. - Maintain strong debugging and testing practices across unit, integration, and automated testing. - Review code and guide improvements to architecture, testing, and development best practices. - Independently resolve complex issues involving performance, security, and cross-platform integration. - Monitor application health and address issues before they escalate. - Document technical decisions, system architecture, and team processes. - Own assigned projects, collaborating cross-functionally, from investigation and planning through development, validation, and delivery. - Ensure mobile development meets accessibility, security, and privacy standards. What you bring - 7+ years of professional software development experience, including 2+ years in a Senior Software Engineer role. - 3+ years of professional mobile application development experience. - Strong experience with Swift, SwiftUI, and iOS frameworks. - Deep knowledge of iOS architecture, design patterns, and performance optimization. - Experience delivering and maintaining complex, scalable, and reliable software. - Experience addressing technical debt and refactoring large or complex codebases. - Strong knowledge of mobile security, including encryption, secure storage, app signing, and vulnerability remediation. - Experience with communication and email protocols such as RSS, IMAP, POP, or Matrix, and familiarity with the IETF standards for CalDav or CardDav. - Advanced proficiency with Git and collaborative development workflows. - Strong debugging, testing, and problem-solving skills. - Strong attention to detail, curiosity, and a product-focused mindset. - The ability to work independently, take ownership, and collaborate across teams. - Respect for diverse skills, experiences, and perspectives. - Excellent async written communication skills; comfortable working with a geographically distributed team. - Ability to learn, evaluate, and responsibly use emerging technologies, including AI-enabled tools, to improve work processes. Bonus points for - Familiarity with Apple App Store and Google Play Store compliance guidelines. - Experience contributing to open-source projects or communities. - Proficiency in French, German, Japanese, or another widely supported Thunderbird language. What success looks like You’ll be successful in this role if you look beyond shipping features and improve the architecture, reliability, security, and long-term health of the product. You’re comfortable solving ambiguous problems, flagging risks early, documenting decisions, and collaborating across engineering, product, UX, users, and the open-source community. Over time, your work will help Thunderbird’s iOS experience become more resilient, scalable, and easier for both staff and community contributors to build on. Work environment This is a full-time, fully remote position. You’ll join a distributed team of Thunderbird staff, open-source community members, and contributors from around the world. We rely on clear communication, thoughtful documentation, and collaborative decision-making to work effectively across time zones and disciplines. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - US: $123,000 - $144,000 USD We may consider candidates with strong skills but less than the required experience. Title, level and compensation will be determined based on qualifications and experience. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - 401(k) co ntributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation.

To learn the Hiring Ranges for this position, please select your location from the Apply Now dropdown menu. To learn more about our Hiring Range System, please click this link. Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: The Ads Engineering organization at Mozilla builds privacy-respecting advertising systems that support Mozilla’s products and business while aligning with our mission and values. Our teams focus on reliable, scalable systems that enable advertising experiences across Mozilla products. As an Engineering Manager on Ads Engineering, you will lead a team of software engineers working on Firefox Suggest Ads , the sponsored suggestion experiences within Firefox Suggest. This team builds and operates backend services, partner integrations, experimentation capabilities, and product-facing systems that help deliver relevant sponsored suggestions in Firefox while respecting user privacy and product quality expectations. You’ll be responsible for building a healthy, effective team; partnering closely with Product, Data, Privacy, Policy, Revenue, and Firefox engineering stakeholders; and ensuring your team delivers high-quality software in support of Ads Engineering goals. This role balances people leadership, execution, and collaboration, with a strong emphasis on mentoring engineers, navigating ambiguity, delivering results, and fostering a positive, inclusive team culture. What you’ll do: - Mentor, support, and develop a team of software engineers, helping them grow in impact and craft - Lead your team through the delivery of Firefox Suggest Ads initiatives, including backend services, partner integrations, experimentation, measurement, reliability improvements, and product-facing integrations where requirements may evolve as privacy, policy, user experience, and business constraints become clearer - Partner with product managers and cross-functional stakeholders to navigate ambiguity, particularly where user data, privacy expectations, or policy considerations shape technical and product decisions - Ensure the software your team builds is reliable, maintainable, and aligned with Mozilla’s quality, security, and privacy standards - Create an environment where engineers can do their best work, including healthy team processes, clear communication, and support through uncertainty - Participate in hiring and onboarding to grow and strengthen the team over time What you’ll bring: - 6+ years of professional software engineering experience, including at least 2 years of people management experience - A track record of leading teams that successfully deliver production software - Strong judgment around prioritization, execution, and balancing short-term delivery with long-term sustainability - Familiarity with modern software development practices, including planning, issue triage, and delivery workflows - Ability to collaborate effectively with product managers and partner teams to deliver outcomes - Experience supporting engineers with varied skill sets, backgrounds, and levels of experience - Comfort working in a distributed, asynchronous environment - Experience in search, ads, recommendations, marketplaces, browser/client-platform integrations, or other privacy-sensitive product domains — or demonstrated ability to quickly learn complex domains where user trust, data practices, and business outcomes must be balanced - Commitment to our values: - Welcoming differences - Being relationship-minded - Practicing responsible participation - Having grit What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-DNI Req ID: R3185

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net The opportunity Thunderbird is growing beyond our free desktop and mobile applications, and we’re looking for a Senior Privacy & Compliance Program Manager to help build and strengthen the privacy, compliance, data governance, and vendor review practices that support MZLA’s products and operations. Privacy and compliance are central to how we build and maintain user trust, particularly for a global user base with a significant presence in Europe. As MZLA expands its products and services, this role will help ensure that data is collected, used, shared, retained, and governed responsibly, in line with Thunderbird’s values and user trust commitments. You will help translate privacy, security, and compliance requirements into practical processes that fit our products and services, infrastructure, support workflows, vendor ecosystem, and operating model. MZLA is a small, growing organization, and the right person will be a hands-on program manager who can create structure without overcomplicating the work. You will work across legal, engineering, product, support, finance, operations, and other Mozilla-wide partners to clarify ownership, track open items, identify when issues need escalation, and keep cross-functional privacy and compliance work moving. This role requires strong judgment, excellent follow-through, and the ability to operate across legal, technical, operational, and leadership contexts. You will help ensure privacy and compliance work is well coordinated, appropriately documented, and grounded in practical processes that support user trust and responsible product development. This role requires regular overlap with Eastern Time working hours for meetings, collaboration, and time-sensitive coordination. We welcome candidates in other time zones who can consistently maintain meaningful overlap with ET. What you’ll do - Coordinate MZLA’s privacy and compliance program work, including planning, recurring reviews, risk tracking, documentation, and leadership reporting. - Translate privacy, security, and compliance requirements into practical processes that fit how MZLA works. - Coordinate vendor and tool reviews with legal, engineering, product, support, finance, operations, and other stakeholders. - Help document data flows, subprocessors, and privacy, security, contractual, and operational considerations. - Support privacy operations and data governance for a global user base, including DSAR and privacy-rights workflows. - Help develop and maintain practical data inventories, records of processing, retention practices, and privacy-related documentation. - Partner with technical teams to support privacy-by-design practices for new products, services, tools, and data-processing activities. - Support compliance and audit-readiness efforts, including ISO-related readiness, evidence tracking, access reviews, and remediation follow-up. - Help strengthen incident response readiness by clarifying roles, escalation paths, documentation expectations, and coordination needs. - Build lightweight guidance, checklists, templates, and training materials that help teams meet privacy and compliance expectations without creating unnecessary bureaucracy. What you bring - 8+ years of relevant professional experience, preferably within a software, SaaS, technology, or technical product environment. - 5+ years of direct or closely related hands-on experience in privacy operations, compliance program management, GRC, legal operations, security compliance, vendor governance, data governance, or a similar function. - Experience coordinating cross-functional programs across legal, engineering, product, support, finance, and operations teams, including work with external counsel, advisors, auditors, consultants, or vendors to move complex work forward. - Experience supporting vendor, tool, or subprocessor reviews, including privacy, security, legal, and operational risk considerations. - Experience supporting privacy operations, data governance, or user-rights workflows for products or services with international users, including areas such as GDPR or EU privacy requirements, DSARs, deletion or export requests, data inventories, records of processing, retention, access controls, or privacy policy maintenance. - Technical fluency and the ability to work with technical teams to understand how data moves through systems, including cloud services, vendor tools, support systems, logs, telemetry, authentication, access permissions, and data storage. - Familiarity with incident response, breach readiness, or security/privacy escalation processes. - Strong project and program management skills, excellent written communication, sound judgment, and the ability to build pragmatic, right-sized processes for a small but growing organization. - Ability to learn, evaluate, and responsibly use emerging technologies, including AI-enabled tools, to improve work processes. - Ability to operate with initiative in areas where processes are still evolving, including identifying stakeholders, proposing next steps, clarifying ownership, and knowing when to escalate. Bonus points for - Experience supporting ISO 27001 readiness, SOC 2 readiness, audits, certifications, or similar compliance efforts. - Experience working in an open-source, consumer software, communications, email, privacy-focused, or mission-driven technology organization. - Experience developing training or enablement materials for privacy, security, compliance, vendor review, or data handling. - Experience with GRC platforms, policy management tools, ticketing systems, vendor management tools, or other systems used to track compliance workflows. - Privacy certification such as CIPP/E, CIPP/US, CIPM, or similar. What success looks like Success in this role means privacy and compliance work is clear, coordinated, and easier for teams to execute. You will help create practical processes, documentation, ownership, and escalation paths for vendor reviews, DSAR workflows, data governance, and compliance readiness. Over time, your work will strengthen user trust, reduce operational risk, and help MZLA scale its products and services without adding unnecessary bureaucracy. Work environment You’ll work with our passionate staff, external partners, and open-source community members from around the world to support the mission and objectives of Thunderbird. This is a remote, full-time position that requires strong communication, documentation, and follow-through. Because this role works across legal, technical, operational, and leadership contexts, you should be comfortable collaborating across time zones and disciplines through video meetings, shared documents, issue trackers, and asynchronous communication. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - US: $115,000 - $145,000 - Canada: $100,000 - $125,000 We may consider candidates with a range of relevant experience. Final title, level, and compensation will be determined based on qualifications, experience, and role scope. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - 401(k) / RRSP contributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation. LI-DNI

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we're shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we're doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren't beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: This role is part of the Governance, Risk & Compliance (GRC) function within Mozilla's Security team. The Security team supports Product, Enterprise, and GRC functions across the organization, aligned with the mission to build a safe and secure internet. This role is responsible for maintaining and advancing Mozilla's Information Security Management System (ISMS) and supporting our ISO 27001 and SOC 2 Type 2 compliance programs — from policy and control design through audit readiness and certification. The ideal candidate has hands-on experience across the full breadth of a compliance program, is comfortable building process where none yet exists, and works well with a wide range of cross-functional stakeholders. What you'll do: - Maintain and mature the ISMS, including the Statement of Applicability (SoA), risk treatment plans, and the Management Review Meeting (MRM) process and cadence. - Support ISO 27001 and SOC 2 Type 2 audit execution—helping determine scope, preparing evidence and narrative artifacts, participating in auditor interviews and walkthroughs, and resolving auditor findings. - Contribute to the SOC 2 System Description and other audit-specific narrative documentation, ensuring they accurately reflect the organization's actual control environment. - Track gaps and remediation efforts arising from readiness assessments and audits. - Lead the policy program—driving policy creation, revision, and cross-functional review cycles to keep the security policy set current, enforceable, and audit-ready. - Support compliance scaling as additional products or business units pursue readiness assessments and certification. - Support the internal audit function, partnering with internal or third-party resources as needed to meet ISO 27001's internal audit requirements. - Partner closely with Engineering, IT, Legal, Privacy, People teams, and product leadership to gather evidence, drive control ownership, and translate compliance requirements into practical, adoptable practices. - Advise the GRC manager and broader Security leadership on audit risk, certification readiness, and compliance program strategy. What you'll bring: - 5 years of experience in information security, GRC, or compliance-focused roles. - Deep familiarity with ISO 27001 and SOC 2 Trust Services Criteria, gained through meaningful involvement in audits from readiness through certification. - Comfort operating across the full breadth of an ISMS—SoA maintenance, Management Review Meetings, and System Description authorship. - Demonstrated experience writing and revising security policies, including running cross-functional review cycles to gain organization-wide buy-in and adoption. - Experience tracking gaps and remediation plans and connecting that work to an organization's broader compliance and risk program. - Excellent cross-functional collaboration skills—comfortable working with engineers, product managers, legal, and executive stakeholders, and able to translate compliance requirements into practical, actionable workflows. - Ability to ramp up quickly and operate with a high degree of independence. - Comfort building processes where none yet exist. - Strong written and verbal communication skills; ability to represent Mozilla credibly and confidently in front of external auditors. - Relevant industry certifications (e.g., CISA, CISSP, ISO 27001 Lead Auditor/Implementer) are a plus. Commitment to our values: - Welcoming differences - Being relationship-minded - Practicing responsible participation - Having grit What you'll get: - Generous performance-based bonus plans to all eligible employees—we share in our success as one team. - Rich medical, dental, and vision coverage. - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute). - Quarterly all-company wellness days where everyone takes a pause together. - Country-specific holidays plus a day off for your birthday. - One-time home office stipend. - Annual professional development budget. - Quarterly well-being stipend. - Considerable paid parental leave. - Employee referral bonus program. - Other benefits (life/AD&D, disability, EAP, etc.—varies by country). About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: C LI-REMOTE Req ID: R3197 Hiring Ranges: Remote France €65.000 - €87.000 EUR

To learn the Hiring Ranges for this position, please select your location from the Apply Now dropdown menu. To learn more about our Hiring Range System, please click this link. Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: This contract recruiter (Duration: approx 6 months) will help grow Mozilla’s global recruiting effort for various Mozilla products. You are joining a team and company at a time of growth and transformation. You will love being surrounded by people who are as passionate as you are about doing their part to make technology, their community, and the world a better place for ALL. What you’ll do: - Partner with hiring managers to understand their talent needs and develop effective recruitment strategies. - Be a strategic advisor to hiring managers, providing insight and direction to ensure we are being proactive and creative in how we attract a diverse pool of qualified applicants - Source, screen, and evaluate candidates using a variety of channels, including HireEz, LinkedIn, applications and referrals. - Conduct detailed screenings to assess technical skills, culture add, and potential for success within Mozilla Corporation. - Manage the full cycle recruitment process, from job posting to offer acceptance. - Foster the growth of a diverse pool of candidates to attract a variety of skilled professionals. - Collaborate with cross-functional teams like compensation, PBPs, legal, and finance. - Use data and analytics to make informed decisions and improve recruitment strategies. What you’ll bring: - 5+ years of proven experience as a full-cycle technical recruiter in the technical industry. - Proficiency in sourcing techniques and tools. - Ability to assess technical skills and evaluate candidates. - Experience with applicant tracking systems (Greenhouse preferred). - Proficiency in using data and analytics to optimize recruitment strategies. - Ability to excel in ambiguous situations for rapidly evolving tech organization - Commitment to our values: - Welcoming differences - Being relationship-minded - Practicing responsible participation - Having grit About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-DNI

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team: The Firefox team is a community of engineers who care deeply about delivering the fastest, friendliest, most usable browser possible. We are responsible for making the things you see in the browser work securely, quickly, and well! Desktop Integrations is a cross-functional team that focuses on updates, installs and integrating Firefox with different OS platforms. As part of the Desktop Integrations team, you will be responsible for all things related to OS integration (particularly Windows and macOS) and helping us grow our user base. Our team is geographically distributed, and working in the open is the norm. We contribute to the code driving the Firefox browser on a number of desktop platforms. About the role: A Senior Software Engineer contributes to architectural discussions, and driving feature development within a team. At Mozilla, Senior Engineers are expected to work independently on scoped projects, collaborate closely with peers, and play a key role in delivering high-quality software that aligns with team goals. What you’ll do: - Contribute to the development and improvement of Firefox features related to installs, updates, and OS integrations. - Help implement enhancements to the Firefox installation and update experience, using data insights to guide development. - Tackle platform-specific challenges in low-level operating system integration on Windows and/or macOS. - Collaborate with your manager and teammates to scope and prioritize work in alignment with the team’s goals. - Participate in code reviews and contribute to technical discussions with peers. - Take ownership of complex bugs and lead efforts to improve the Firefox experience for hundreds of millions of users. - Work closely with your geographically distributed team in a highly collaborative environment. What you’ll bring: - 3-5 years experience as Software Engineer - Experience with systems-level programming on at least one major platform (Windows, macOS). - Solid programming skills in C/C++. - Effective communicator and collaborator, especially in distributed teams. - Ability to break down technical work and make steady progress within project timelines. - A collaborative mindset and a desire to contribute to team success. Bonus Points - Programming experience in Rust. - Experience working with Windows and/or macOS APIs at a low level (e.g., Win32, Cocoa). - Additional experience with Linux, or macOS internals. - Contributions to open source projects. We value a variety of voices within our team and at Mozilla. You don't need to check every box on this list to apply. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: C LI-REMOTE Req ID: R3160 Hiring Ranges: Remote Germany €68.000 - €91.000 EUR

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: As a Senior Software Engineer on the Ecosystem Services Team, you’ll build and own back-end systems and the integrations that keep our services running, help maintain and evolve the cloud infrastructure the application runs on, and play an active role in keeping the service reliable and healthy in production. You'll do this while collaborating closely with frontend engineers, product managers, CloudEng, and UX and design partners to deliver reliable features. We are looking for engineers who treat the systems they build as their own: people who are comfortable owning a service end to end, from writing the code to verifying it works as intended in production and monitoring its health. We are hiring for multiple Ecosystem Services Team back-end teams - each solving their own unique challenges to make the web better for everyone. More details about all hiring teams will be shared in the interviews. About Ecosystem Services Ecosystem Services builds and operates the back-end platforms that power Mozilla products and services, with a focus on privacy, security, and delivering critical functionality to Firefox and millions of users worldwide. Our portfolio spans a diverse set of platforms and services. Representative examples include Privacy Services, which provides the APIs and infrastructure behind Mozilla VPN, Relay (email and phone aliasing), and Monitor (data breach detection and remediation); AutoPush, Mozilla's Web Push platform for securely delivering notifications and real-time updates to Firefox clients; and Remote Settings, Mozilla's platform for delivering configuration updates to Firefox outside the regular release cycle. Together with many other backend platforms across the organization, these services help deliver secure, reliable experiences to Mozilla users every day. Our teams own services end-to-end from designing and building distributed systems, to operating them in production, improving reliability, and evolving the cloud infrastructure they run on. We work closely with product, frontend engineering, Cloud Engineering, UX, and design partners to build resilient systems that make the web better for everyone. We're hiring backend engineers across multiple Ecosystem Services teams, each tackling different technical challenges while sharing a culture of ownership, collaboration, and operational excellence. More details about the specific teams and domains will be shared during the interview process. What you’ll do: - Lead backend development, building and maintaining server-side logic - Take real ownership of the services you work on: deploy them, operate them, and keep them healthy in production rather than handing them off - Work closely with our CloudEng Team to maintain and improve production environments, including monitoring and alerting with tools such as OpenTelemetry, Sentry, Prometheus, and Grafana - Participate in an on-call / off-hours support rotation, triaging and resolving production issues, partnering with CloudEng and support teams to investigate incidents, address bug reports, and keep the application running reliably - Periodically rotate into a support role, handling releases, dependency updates, and incoming work requests from customer support and other stakeholders - Thoughtfully apply AI-assisted development tools to move faster and raise quality, while maintaining good judgment about where they fit and where they don't - Partner with and support stakeholders (e.g. front-end, platform), ensuring backend systems, APIs, and data contracts meet their needs - Partner with frontend and cross-functional teams to align on project goals, contribute to API design, and ensure backend systems, APIs, and data contracts meet their needs - Participate in code reviews to maintain high standards of code quality and system reliability - Participate in security and privacy reviews, ensuring all data protection measures meet compliance standards What you’ll bring: - 4+ years of experience in software development with a strong focus on backend technologies - Strong professional experience with Python , TypeScript/Node.js, or Rust building back-end services and confidence leading back-end engineering projects. - Proficiency with PostgreSQL and SQL query optimization, including relational schema design and migrations with a query builder such as Knex - Hands-on DevOps experience on Google Cloud Platform (GCP), with Docker-based build and deploy pipelines. You are comfortable deploying, operating, and troubleshooting services in the cloud rather than handing that responsibility to someone else - Hands-on experience with observability and monitoring tooling such as Sentry and Grafana - A pragmatic commitment to shipping quality work. You care about the quality and reliability of what you ship, you make sensible trade-offs under real constraints, and you consistently move work to and into production. - Strong engineering judgment. You can navigate ambiguity, weigh trade-offs, and make sound decisions with incomplete information, and you know when to ask for input - A genuine ownership mindset. You are excited to own a service end to end and have a track record of operating what you build in production, including experience with on-call or off-hours production support - Experience mentoring junior engineers and driving technical excellence in code quality, testing, and process improvements Bonus Points for experience with: - Performance / load testing - Experience with IaC tools such as Terraform and Kubernetes - Open-source contributions or personal engineering projects - Django experience What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3195 Hiring Ranges: Canada Tier 1 Locations $104,000 - $139,000 CAD Canada Tier 2 Locations $95,000 - $126,000 CAD

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: Mozilla Marketing Team is looking for an organized and detail-oriented Production Designer to join our team. This person will be responsible for leading the visual execution of creative assets for projects across film, advertising, and digital media. The Production Designer is responsible for ensuring visual consistency from concept through completion. This role collaborates closely with creative directors, producers, creative teams, and marketing partners to bring stories and ideas to life through design. What you’ll do: - Design and execute high-volume visual assets, including digital ads, social media content, and campaign visuals - Oversee the rapid production of assets, ensuring brand guidelines and quality standards are met for mass distribution - Create and maintain a library of design templates, style guides, and visual components for efficient, large-scale asset creation - Manage production timelines and resources to deliver a continuous flow of assets on schedule - Source and manage stock photography, graphic elements, and other visual resources within budget - Supervise the final preparation and delivery of assets across multiple platforms and formats - Ensure visual and brand continuity across all high-volume advertising touchpoints - Stay current with platform-specific design best practices and emerging advertising technologies What you’ll bring: - Bachelor’s degree in Production Design, Fine Arts, or related field (or equivalent experience) - Proven experience as a Production Designer or similar role - Strong portfolio demonstrating creative execution and technical skills - Proficiency in design software (e.g., Adobe Creative Suite, figma) - Experience with AI image and asset generation - Excellent communication and collaboration skills - Strong understanding of brand design, campaign creative, and visual storytelling - Ability to manage multiple projects under tight deadlines with meticulous attention to detail and craft - Understanding of the marketing funnel and extensive experience with high-volume media delivery. Preferred (But Not Required) - Experience in film, television, or advertising industries - Motion design experience - Problem-solving mindset with high attention to detail About Mozilla When you work at Mozilla, you give yourself a chance to make a difference in the lives of web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the web as the platform and help create more opportunity and innovation for everyone online. We’re not a normal tech company. The things we create prioritize people and their privacy over profits. We exist to make the internet a healthier, happier place for everyone. Commitment to diversity, equity and inclusion Mozilla believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose.

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: The Ads Engineering organization at Mozilla builds privacy-respecting advertising systems that support Mozilla’s products and business while aligning with our mission and values. Our teams focus on reliable, scalable systems that enable advertising experiences across Mozilla products. As an Engineering Manager on Ads Engineering, you will lead a team of software engineers working on Firefox Suggest Ads , the sponsored suggestion experiences within Firefox Suggest. This team builds and operates backend services, partner integrations, experimentation capabilities, and product-facing systems that help deliver relevant sponsored suggestions in Firefox while respecting user privacy and product quality expectations. You’ll be responsible for building a healthy, effective team; partnering closely with Product, Data, Privacy, Policy, Revenue, and Firefox engineering stakeholders; and ensuring your team delivers high-quality software in support of Ads Engineering goals. This role balances people leadership, execution, and collaboration, with a strong emphasis on mentoring engineers, navigating ambiguity, delivering results, and fostering a positive, inclusive team culture. What you’ll do: - Mentor, support, and develop a team of software engineers, helping them grow in impact and craft - Lead your team through the delivery of Firefox Suggest Ads initiatives, including backend services, partner integrations, experimentation, measurement, reliability improvements, and product-facing integrations where requirements may evolve as privacy, policy, user experience, and business constraints become clearer - Partner with product managers and cross-functional stakeholders to navigate ambiguity, particularly where user data, privacy expectations, or policy considerations shape technical and product decisions - Ensure the software your team builds is reliable, maintainable, and aligned with Mozilla’s quality, security, and privacy standards - Create an environment where engineers can do their best work, including healthy team processes, clear communication, and support through uncertainty - Participate in hiring and onboarding to grow and strengthen the team over time What you’ll bring: - 6+ years of professional software engineering experience, including at least 2 years of people management experience - A track record of leading teams that successfully deliver production software - Strong judgment around prioritization, execution, and balancing short-term delivery with long-term sustainability - Familiarity with modern software development practices, including planning, issue triage, and delivery workflows - Ability to collaborate effectively with product managers and partner teams to deliver outcomes - Experience supporting engineers with varied skill sets, backgrounds, and levels of experience - Comfort working in a distributed, asynchronous environment - Experience in search, ads, recommendations, marketplaces, browser/client-platform integrations, or other privacy-sensitive product domains — or demonstrated ability to quickly learn complex domains where user trust, data practices, and business outcomes must be balanced - Commitment to our values: - Welcoming differences - Being relationship-minded - Practicing responsible participation - Having grit What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3185 Hiring Ranges: Canada Tier 1 Locations $165,000 - $220,000 CAD Canada Tier 2 Locations $149,000 - $199,000 CAD

Brand Copywriter (Part-Time, Freelance) About the role Mozilla Foundation works on some of the hardest questions in tech: how AI gets built and governed, who the internet serves, and what a healthier digital world actually looks like. The thinking behind that work is rigorous. It draws on research, policy analysis, and years of expertise. The problem is that rigorous thinking often stays locked inside reports and briefings, written for people who already agree with us. We're looking for a copywriter who can unlock it. Someone who can take a dense idea, understand it properly, and rewrite it so a curious person with no background in what we do, gets it in one read. It shouldn’t be dumbed down or stripped of nuance, just super clear. This is a part-time freelance role reporting into the marketing team, focused on campaign and marketing copy. Please note: This is an independent contractor opportunity and is not an employment position with Mozilla Foundation. What you'll do - Write campaign copy across channels: web pages, email, social, video scripts, and paid placements - Work with researchers, fellows, and program leads to translate their work into copy that holds up to their scrutiny and lands with a general audience - Take briefs from concept to final copy, including headlines, taglines, and CTAs - Adapt one core idea into many formats without the message drifting - Protect the integrity of the source material. If a simplification changes the meaning, you flag it and find another way in - Keep our voice consistent across campaigns while giving each one room to feel distinct What we're looking for - 5+ years writing brand or campaign copy, ideally some of it for mission-driven organizations, research institutions, or brands dealing in complex subject matter - Proof that you can do the hard version of simplifying: a portfolio piece where the source material was technical or academic and the output was genuinely readable - Comfort interviewing subject-matter experts and pushing back when the jargon creeps in - Strong editing instincts. You know the difference between shorter and clearer - Self-directed. You can run with a brief, manage your own hours, and hit deadlines without hand-holding - Interest in the issues we work on: AI accountability, privacy, open internet. You don't need to be an expert but being interested helps! Nice to have - Experience in advocacy, campaigning, or public-interest communications - Familiarity with SEO and performance copy basics - Experience writing for global audiences - Experience writing exec communications Engagement Details - Engagement Type: Freelance contract, part-time - Commitment: Approximately 10-15 hours per week (to begin) - Location: Remote - Term: Initial 3-month engagement - Rate: Competitive day rate, based on experience How to apply: Please submit the following: - Three writing samples that demonstrate your range as a copywriter. These must be existing pieces, such as published work. You may either attach them as documents or share links to them. Provision is made for both options in the application fields. - A short note about the hardest idea you have ever had to make simple. Please make sure your response addresses the following: - What made the idea difficult to explain? - How did you approach the work and decide what to simplify, emphasize, or leave out? - What was the final result, and what (if anything) you’d do differently now? We’re not just interested in the finished product, but also in how you think, make creative choices, and translate complex ideas into clear and compelling language. If your example relates to one of the writing samples you are submitting, please indicate which one. We're excited to see your creativity and learn how you'd help bring Mozilla Foundation's mission to life . LI-REMOTE

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we're shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we're doing this while never losing our focus on our core mission to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren't beholden to any shareholders—only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: Our Global Talent Acquisition Operations team architect and execute hiring strategies that power Mozilla’s growth across commercial, product, and mission-aligned business units. As a Senior GTM Recruiter (P4) in the UK, you will drive full-lifecycle recruitment for critical Go-To-Market and commercial functions across EMEA and international regions. You will act as a trusted strategic advisor to senior stakeholders, scaling pipelines for high-impact revenue, marketing, sales, and business development roles. What you'll do: - Drive Full-Lifecycle GTM Hiring: Lead full-cycle recruitment for complex Go-To-Market functions—including Sales, Enterprise Business Development, Product Marketing, Commercial Partnerships, and Customer Success—delivering high-performing talent across EMEA and global markets. - Execute Strategic Sourcing & Pipeline Engineering: Architect multi-channel candidate attraction strategies using HireEZ, LinkedIn Recruiter, and specialized talent communities to build diverse, high-converting pipelines for niche commercial profiles. - Partner as a P4 Subject Matter Expert: Provide data-backed talent intelligence and market insights to senior GTM leaders, driving requisition alignment, calibrated scorecards, structured interview loops, and compensation strategy. - Manage Advanced Negotiations & Offer Execution: Structure and negotiate complex, region-specific international offers, navigating UK/EMEA statutory requirements, equity components, and competitive counter-offer scenarios. - Optimize ATS Hygiene & Operational Metrics: Maintain strict Greenhouse ATS data integrity, track funnel analytics (Time-to-Fill, Source Yield, Offer Acceptance Rates), and drive continuous hiring-process optimizations in line with global TA standards. What you'll bring: - 5+ years of full-cycle recruiting experience with a focus on Go-To-Market, Commercial, or Revenue-generating roles in high-growth technology or SaaS environments. - Proven track record of sourcing and closing senior-level commercial talent (e.g., Enterprise Sales, Commercial Partnerships, Product Marketing) within the UK and EMEA markets. - Expertise with recruitment technologies and operations , including Greenhouse ATS, HireEZ, LinkedIn Recruiter, and data-driven pipeline analytics - Strong understanding of UK and European labor compliance , contract worker models, IR35 nuances, and regional offer structuring. - Demonstrated expertise in structured, competency-based interviewing methodologies (e.g., Interview Edge) to evaluate technical proficiency and mitigate hiring bias About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. LI-REMOTE

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we're shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we're doing this while never losing our focus on our core mission to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren't beholden to any shareholders—only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: The Data Science organization shapes Mozilla's most important business decisions through data. As a Senior Staff (P5) Data Scientist, you will be an analytical leader, partnering with senior executives to turn ambiguity into clear, data-driven recommendations that influence Mozilla's long-term strategy. What you'll do: - Strategic Influence: Shape Mozilla's most important business decisions with rigorous, data-driven insights. Turn ambiguity into clear recommendations that influence executive thinking and long-term strategy. - Trusted Partnerships: Build trusted relationships with senior leaders and cross-functional partners. Surface tradeoffs, align stakeholders with differing perspectives, and help teams make better, faster decisions. - Technical Excellence: Design and deliver sophisticated analytical solutions to solve complex, ambiguous problems involving large-scale, high-dimensional data. Set a high technical bar through sound methodology, statistical rigor, and pragmatic execution. - Mentorship and Growth: Serve as a technical leader within the Data Science community. Mentor data scientists, advise managers on technical direction, and elevate the quality of analytical work across the organization. What you'll bring: - Exceptional Communication: Outstanding verbal and written communication skills, with the ability to translate complex technical findings into clear, decision-ready recommendations while preserving analytical rigor. Proven success communicating effectively with both technical and executive audiences. - Influence Without Authority: A track record of driving alignment across cross-functional teams, earning trust through expertise, and leading through influence rather than formal authority. Experience across multiple industries, domains, or problem spaces is a plus. - Technical Mastery: Deep expertise in Python or R, SQL, statistics, and modern data science tooling. A strong foundation in analytical methods, paired with curiosity for emerging technologies and sound judgment about when to apply them. What you’ll get: - Generous performance-based bonus plans to all eligible employees - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: C LI-REMOTE Req ID: R3163 Hiring Ranges: Canada Tier 1 Locations $191,000 - $255,000 CAD Canada Tier 2 Locations $173,000 - $231,000 CAD

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: At Mozilla, we believe the internet is a global public resource—open and accessible to all. As a Security Engineer, you'll protect that vision by building, breaking, and hardening products that put people’s privacy and safety first. We are looking for a security engineer to own, manage and administer the Mozilla Web Bug Bounty program and work with Mozilla product and SIRT teams to ensure risk mitigation of security incidents and events. What you’ll do: - Own and scale Mozilla’s web bug bounty program, including strategy, prioritization, KPIs, and continuous improvement - Act as the primary interface with external researchers and platforms (e.g., HackerOne), fostering a high-quality and trusted research community - Lead triage and technical validation of incoming reports across multiple intake channels (HackerOne, Bugzilla, email) - Drive end-to-end vulnerability remediation, partnering with engineering teams to ensure timely, effective fixes - Identify root causes and systemic issues, and influence long-term improvements in secure development practices - Collaborate with the Security Incident Response Team (SIRT) on active incidents and post-incident reviews - Perform targeted code reviews (primarily JavaScript and Python) during investigations and high-risk changes - Develop or leverage tooling to improve triage efficiency, signal quality, and program insights What you’ll bring: - 3+ years of demonstrated ability in a security engineering role. - Experience operating bug bounty programs, including enhancements, automation and scaling, and/or bug hunting - Practical experience working with modern cloud technologies (eg. Amazon Web Services, Google Cloud Platform, Heroku, Microsoft Azure, etc.) - Experience analyzing code and systems to move from vulnerability → root cause → prevention - Real-world experience in software development and/or engineering operations - Ability to develop your own tools as needed in a variety of programming languages (eg. Python, Go, Rust, Javascript, etc.) is a plus, but not required. - Strong communication, collaboration, and problem-solving skills, with the ability to influence and guide cross-functional teams. - Formal credentials are great, but real-world experience, curiosity, passion and a growth mindset matter more. What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3105 Hiring Ranges: US Tier 1 Locations $137,000 - $183,000 USD US Tier 2 Locations $126,000 - $168,000 USD US Tier 3 Locations $116,000 - $155,000 USD

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. About this team and role: The role is part of the IT Function within the broader Mozilla Infrastructure team. The IT team supports ERP Services, Workplace services, Service-Desk and On-Prem DC Services across the organization aligned with the mission to build a safe & secure internet. As a Software (Application) Engineer in the newly formed Workplace technology team, you’ll help design, build, and maintain the systems and automations that power Mozilla’s workplace technologies — from collaboration and AI productivity tools to identity and access workflows. You’ll manage day-to-day administration, develop scripts and integrations, and contribute to projects that improve reliability, security, and user experience. This role is hands-on and growth-oriented, offering opportunities to deepen your technical expertise while shaping how Mozillians work and collaborate. Note : You don’t need to meet every listed qualification to be considered — we value diverse experiences and learning potential. What you’ll do: - Design, build, and maintain scripts, APIs, and workflow automations that power key workplace systems — collaboration tools (Google Workspace, Slack, Zoom, Atlassian) and identity platforms (Okta). - Develop lightweight services or integrations that connect collaboration, GenAI-tools (OpenAI, Claude, Gemini) and internal systems, enabling agentic flows (e.g., virtual assistants, workflow agents) that reduce manual work and improve user experience. - Implement monitoring, logging and observability for automation and AI workflows; troubleshoot issues and uncover opportunities for reliability, scalability, and cost-efficiency. - Contribute to the evolution of secure onboarding, off-boarding, and mover workflows across access, permissions and SaaS tools — with automation and safe agentic handoffs where appropriate. - Collaborate with IT, Security, and People teams to ensure identity, data, and compliance standards (SSO, DLP, classification) are deeply embedded through automation and script-driven guardrails. - Participate in pilot projects for new AI and productivity capabilities: integrate LLMs & agents, track usage/adoption metrics, build flows that assist users (e.g., knowledge-agent, document summarizer). - Contribute to the code-review process, documentation of shared libraries for workflows/agents, and build a library of integration templates for reuse across the team. - Partner with senior engineers to modernize workplace systems through scalable architecture, API-first design, and intelligent agentic workflows. What you'll bring: - 4–6 years of experience in software engineering, systems integration or workplace technology development, with a focus on automation or scripting. - Proficiency in one or more programming/scripting languages (Java, Go, Python, JavaScript/Apps Script, Bash, PowerShell) and comfortable with RESTful APIs, webhooks, and integration frameworks. - Familiarity with SaaS platforms (Google Workspace, Slack, Zoom, Atlassian) and interest in agentic/AI workflows (LLMs, agents, prompt pipelines). - Understanding of IAM/SSO (Okta, SAML/OIDC/SCIM) or a willingness to grow in this area; experience automating provisioning/access is a plus. - Experience or curiosity about CI/CD, workflow orchestration, and building self-service delivery models that leverage agents or automation. - Strong troubleshooting, documentation and cross-functional communication skills; comfortable collaborating with non-technical partners and translating automation into tangible operational gains. - A growth mindset: you embrace learning new AI technologies, care about user experience, and seek to improve systems through intelligent workflows. - Interest in building agentic flows (for example: bots that triage tickets, summarize documents, assist user tasks) and integrating them responsibly into workplace systems. - Commitment to our values: - Welcoming differences - Being relationship-minded - Practicing responsible participation - Having grit What you’ll get: - Generous performance-based bonus plans to all eligible employees - we share in our success as one team - Rich medical, dental, and vision coverage - Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute) - Quarterly all-company wellness days where everyone takes a pause together - Country specific holidays plus a day off for your birthday - One-time home office stipend - Annual professional development budget - Quarterly well-being stipend - Considerable paid parental leave - Employee referral bonus program - Other benefits (life/AD&D, disability, EAP, etc. - varies by country) About Mozilla Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. Commitment to diversity, equity, inclusion, and belonging Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientation s, gender identities, and expressions. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. Group: D LI-REMOTE Req ID: R3188 Hiring Ranges: Canada Tier 1 Locations $104,000 - $139,000 CAD Canada Tier 2 Locations $95,000 - $126,000 CAD

Why Thunderbird? Thunderbird is one of the world’s most trusted open-source email applications, empowering more than 20 million people globally. At MZLA, the team behind Thunderbird, we build privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data. We are open source by design. Our products are developed transparently and in collaboration with a global community of contributors, and that same spirit shapes how we work: collaboratively, inclusively, and with a shared commitment to putting users first. We are a small but growing company of 60+ people distributed across seven countries. As Thunderbird evolves beyond a single desktop application, we are expanding across desktop, mobile, paid services, and new product experiences that help people and organizations work more effectively without giving up control to big tech ecosystems. Our revenue model combines user donations, which help keep Thunderbird’s apps freely available, with paid services that cover the costs of hosted offerings while supporting long-term sustainability and continued innovation. A note about MZLA and Mozilla: MZLA Technologies Corporation is the nonprofit-owned company behind Thunderbird and part of the Mozilla family. MZLA is separate from Mozilla Corporation and has its own compensation programs, benefits, and employment policies. To learn more, visit www.thunderbird.net The opportunity The Senior Software Engineer, iOS is an experienced individual contributor who brings deep iOS expertise to the design, development, and evolution of Thunderbird’s iOS application. This role will continue to contribute to Thunderbirds effort to develop the iOS app and establish a strong technical foundation for the product. You’ll work closely with mobile engineers, product management, UX, and other partners to deliver a high-quality iOS experience that meets high standards for performance, reliability, accessibility, security, and maintainability. You’ll play an important role in delivering exceptional user experiences for Thunderbird’s global user base by translating product needs into thoughtful technical solutions and ensuring your work aligns with MZLA’s mission and the objectives of the Thunderbird Project. You’ll also collaborate with open-source contributors and mobile engineers across the broader Mozilla ecosystem. What you’ll do - Build and refine Thunderbird’s mobile products and platform architecture. - Improve scalability, performance, reliability, and user experience. - Develop a deep understanding of the codebase and architecture to confidently make changes across the entire stack. - Maintain strong debugging and testing practices across unit, integration, and automated testing. - Review code and guide improvements to architecture, testing, and development best practices. - Independently resolve complex issues involving performance, security, and cross-platform integration. - Monitor application health and address issues before they escalate. - Document technical decisions, system architecture, and team processes. - Own assigned projects, collaborating cross-functionally, from investigation and planning through development, validation, and delivery. - Ensure mobile development meets accessibility, security, and privacy standards. What you bring - 7+ years of professional software development experience, including 2+ years in a Senior Software Engineer role. - 3+ years of professional mobile application development experience. - Strong experience with Swift, SwiftUI, and iOS frameworks. - Deep knowledge of iOS architecture, design patterns, and performance optimization. - Experience delivering and maintaining complex, scalable, and reliable software. - Experience addressing technical debt and refactoring large or complex codebases. - Strong knowledge of mobile security, including encryption, secure storage, app signing, and vulnerability remediation. - Experience with communication and email protocols such as RSS, IMAP, POP, or Matrix, and familiarity with the IETF standards for CalDav or CardDav. - Advanced proficiency with Git and collaborative development workflows. - Strong debugging, testing, and problem-solving skills. - Strong attention to detail, curiosity, and a product-focused mindset. - The ability to work independently, take ownership, and collaborate across teams. - Respect for diverse skills, experiences, and perspectives. - Excellent async written communication skills; comfortable working with a geographically distributed team. - Ability to learn, evaluate, and responsibly use emerging technologies, including AI-enabled tools, to improve work processes. Bonus points for - Familiarity with Apple App Store and Google Play Store compliance guidelines. - Experience contributing to open-source projects or communities. - Proficiency in French, German, Japanese, or another widely supported Thunderbird language. What success looks like You’ll be successful in this role if you look beyond shipping features and improve the architecture, reliability, security, and long-term health of the product. You’re comfortable solving ambiguous problems, flagging risks early, documenting decisions, and collaborating across engineering, product, UX, users, and the open-source community. Over time, your work will help Thunderbird’s iOS experience become more resilient, scalable, and easier for both staff and community contributors to build on. Work environment This is a full-time, fully remote position. You’ll join a distributed team of Thunderbird staff, open-source community members, and contributors from around the world. We rely on clear communication, thoughtful documentation, and collaborative decision-making to work effectively across time zones and disciplines. Compensation & benefits We benchmark our base salaries to local markets and target the 60th percentile of the peer market. The salary ranges for this role are: - Canada: $108,000 - $125,000 CAD We may consider candidates with strong skills but less than the required experience. Title, level and compensation will be determined based on qualifications and experience. In addition to competitive salaries, we offer a comprehensive benefits package designed to support your whole self. Work & career - Fully remote work & schedule flexibility - Company-provided laptop - Annual bonus program - Monthly remote work stipend - Annual professional development stipend - Access to Coursera l earning platform - Industry conferences - Company all-hands and team gatherings Rest & play - 24 days PTO per year (prorated) - Your birthday - Year-end company shutdown - 9 wellbeing days - Public holidays - Other paid leave - Quarterly wellbeing stipend for personal / family activities Health & family - RRSP co ntributions - Health, dental, & vision insurance - Disability insurance - Life insurance - Employee assistance program - Paid parental leave - Paid sick days Work eligibility Applicants must reside in and have permanent work authorization for the country location(s) specified in the posting. We are unable to consider applicants outside of these markets at this time. And, we do not provide visa sponsorship. How to apply Please apply directly through our career page . We carefully review every cover letter and screening question, so take the time to answer each fully. We value authentic, thoughtful responses that reflect your own experience and perspective. It is fine to use AI tools to polish your writing, but your answers should be your own. Candidates who submit generic or unoriginal AI-generated responses may be disqualified from further consideration. Our commitment to diversity, equity, and inclusion MZLA believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities and expressions. We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. MZLA will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose. We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodations@thunderbird.net to request accommodation.

Part-Time Social Media Content Creator [Independent Contractor Opportunity]: Mozilla Foundation Mozilla has been fighting for an open internet since before it was cool. We're looking for a part-time content creator to help us tell that story on Social Media and make people care about why this work is more important than ever before. We want someone who understands internet culture, gets how ideas spread online, and can turn the incredible work we fund (and Mozilla’s mission), into educational and entertaining content people want to share. Please note: This is an independent contractor opportunity and is not an employment position with Mozilla Foundation. What you'll do: Create and publish Social Media content (e.g. Instagram Reels, Stories) that builds awareness and community. You'll work closely with our Social Media Manager to surface the people, moments, and ideas that will make Mozilla worth following. What we're looking for: - You have a point of view and know how to express it - You love to create Reels and are a pro at editing - You’re creative and full of ideas for social - You’re comfortable in front of the camera - You are skilled at shooting and editing short form video content - You understand how the algorithm works and how to create content that performs - You care about building an internet that works for all! Engagement details: - Engagement type: Independent Contractor (Statement of Work) - Commitment: Approximately 15–20 hours per week - Location: Remote Canada, Remote USA - Duration: To be determined by mutual agreement Pay Rate: - Hourly contractor engagement at US$50–60/hour , with an anticipated commitment of approximately 15–20 hours per week , not to exceed the approved monthly budget unless otherwise agreed in writing. How to apply: Please ensure your submission includes the following: