Jobs at Mozilla

You will build rapid prototypes on open source AI infrastructure to make abstract ideas tangible for developers. Work in public alongside community and social teams to create demos that spark engagement and conversation.

As a Senior Data Engineer at Mozilla, you will build and manage data pipelines, transform telemetry data into reliable datasets, and partner with data scientists and product teams to drive data-informed decisions. You'll also help evolve our data platform, ensure data quality and integrity, and implement governance policies.

You'll build and manage data pipelines, transform Firefox telemetry data into reliable datasets, partner with teams to create models and metrics, and ensure data quality and governance across tens of terabytes of data daily.

You will build and activate a global community of developers working on open source AI. Your role involves owning the builder pipeline, organizing events, cultivating partnerships, and surfacing community needs to inform Mozilla's broader AI efforts.

You will design, build, and maintain data pipelines and models that power data-driven decisions at Mozilla, ensuring data quality and accessibility across the organization.

You'll partner with Sales to support strategic enterprise opportunities for Firefox Enterprise. You'll lead technical discovery and solution design with customers, helping them evaluate and deploy Firefox in complex environments. This role combines deep **enterprise architecture** expertise with **customer-facing technical credibility** in France.

You'll **operate and evolve** our EKS-based Kubernetes platform, design CI/CD systems for websites and Thunderbird desktop releases, and diagnose production incidents. Your work ensures **reliable infrastructure** for 20M+ open-source email users. You'll thrive in a **distributed, ambiguity-tolerant** team with a privacy-first mission.

You'll join the growing distributed team behind Thunderbird to **operate and evolve our EKS-based Kubernetes platform** and **design CI/CD systems** that millions of users depend on. You'll drive reliability improvements, collaborate with engineers and contributors, and help build **privacy-respecting infrastructure** that puts users first.

You'll implement **privacy-improving anti-tracking features** in the Firefox web browser and advance **browser architecture** to make the web safer. Your work will directly protect users from unhealthy tracking.

You'll partner with Sales to support strategic enterprise opportunities for **Firefox Enterprise** in France, leading technical discovery and solution design. Your work will help enterprises evaluate and deploy Firefox in secure, regulated environments. This role stands out for its focus on **French IT landscape** and **public sector clients**.

You'll join Mozilla's AI Platform team to **build foundational infrastructure** powering intelligent experiences across products. You'll design and operate **model training pipelines** and **high-throughput inference services** at global scale, ensuring secure and privacy-respecting AI systems.

You'll design and operate **core AI platform components** for training, deploying, and serving ML models at scale. Your work will directly enable **privacy-respecting AI systems** across Mozilla's products like Firefox. You'll join a **non-profit-backed tech company** that prioritizes mission over shareholders.

You'll **operate and evolve our EKS-based Kubernetes platform** and **design CI/CD systems** for MZLA websites and services. You'll drive **reliability and security improvements** across infrastructure, supporting millions of open-source email users.

You'll design and develop **CI/CD systems** for MZLA websites and services, operate an **EKS-based Kubernetes platform**, and implement improvements to enhance system reliability. Your work will ensure that Thunderbird users and teams depend on reliable infrastructure every day.

You'll lead **test strategy** for Firefox Mobile across Android and iOS, managing a distributed team of engineers and contractors. You'll drive **quality outcomes** through automation, observability, and exploratory testing, partnering with product and engineering leadership to improve development speed and product health.

You'll set Firefox Mobile's overall quality strategy, lead exploratory testing, and manage a team building automation infrastructure. You'll partner with Android and iOS engineering, product, and UX teams to drive development speed, developer ease, and product quality. This role offers the chance to shape quality for a browser used by tens of millions.

You'll **lead mixed methods research** across Mozilla's mobile and privacy products, shaping product and design strategy. Your insights will **directly impact roadmaps** for Firefox and other pioneering brands. This role offers a chance to **coach the next generation** of researchers while working at a non-profit backed tech company committed to internet health.

You'll lead a distributed team of engineers to **drive improvements** to the Firefox Desktop experience. Your core impact will be **delivering high-quality user interface innovations** that shape how millions browse the web. This role stands out for its mission-driven work at a **non-profit-backed technology company**.

You'll build **privacy-forward advertising infrastructure** for Mozilla's products like Firefox and Pocket, using **Rust and Python**. Your work will enable ethical, performant ad experiences while shaping Mozilla's advertising strategy.

You'll contribute to Mozilla's Ads Engineering team, building **privacy-forward advertising infrastructure** for Firefox and other products. You'll implement scalable, privacy-preserving components in **Rust and Python**. This role offers the chance to shape ethical advertising at a mission-driven, non-profit-backed tech leader.

You'll manage Mozilla's NetSuite ERP ecosystem, ensuring optimal performance and integrating with other applications via middleware or Python scripts. You'll drive end-to-end Order-to-Cash execution and provide **thought leadership** on best practices. This role offers the chance to shape the next 25 years of technology at a **mission-driven organization**.

You'll support the ERP system and manage NetSuite initiatives at Mozilla. You'll evaluate business needs and develop systems to improve data flow and operational efficiency. This role offers the chance to work on **open-source software** that impacts millions.

You'll execute digital marketing campaigns for **Thunderbird**, a trusted open-source email application, driving brand awareness and user growth. Your work will directly impact **20 million global users** through social media, blog content, and email marketing. You'll collaborate with a **distributed team** across seven countries in a privacy-respecting, open-source environment.

You'll execute digital marketing activities for Thunderbird, a trusted open-source email app. You'll drive brand awareness and user growth across social media, blog, and email channels. This is a hands-on role where you'll **produce high-quality content** and **coordinate campaign activities** in a fully remote, distributed team.

You'll deliver **technical support** for Thunderbird's expanding product ecosystem, including **subscription products**. You'll troubleshoot Level 1-2 issues via tickets, forums, and app store reviews, ensuring users feel heard and unstuck. This role is key to **shaping support practices** for growing products in a remote, open-source environment.

You'll join Thunderbird's Support Operations team to deliver excellent support for our growing product ecosystem, including subscription products. Your core impact is resolving technical issues with care and precision, helping users get unstuck and back to their work. This role stands out because you'll help **shape support practices** for a privacy-respecting alternative to big tech ecosystems.

You'll join a team that builds and maintains Mozilla's development workflows and CI systems, enabling Firefox engineers to **efficiently develop, test, and deliver features**. You'll improve automation, reduce debugging time, and **analyze data to identify workflow trends**. You'll impact millions of users by enhancing the productivity of Firefox developers worldwide.

You'll execute digital marketing activities for **Thunderbird**, supporting brand awareness, user growth, and product adoption. Your work will involve **social media management, content creation, and campaign coordination** across multiple channels. This role offers the chance to contribute to a **privacy-respecting open-source ecosystem** with a global impact.

You'll lead the **design, reliability, and evolution** of hybrid-cloud and workplace infrastructure at Mozilla. Your work will directly impact how over 225 million users experience the internet. This senior role combines **hands-on technical execution** with **cross-team leadership** to shape scalable, secure systems.

You'll lead **hybrid-cloud infrastructure** design and reliability at **Mozilla**, shaping systems that serve over 225 million users. You'll drive complex initiatives, set technical direction, and ensure scalable, secure, and efficient operations. This senior role combines hands-on technical execution with **cross-team leadership**.

You'll lead the design and reliability of hybrid-cloud and workplace infrastructure at Mozilla. You'll drive complex, high-impact projects across teams, shaping technical strategy and systems architecture. This role offers the chance to influence the internet's future while working on open-source technology.

You'll build **high quality user interfaces** for the Firefox browser with a focus on accessibility and usability. You'll tackle complex problems in a large codebase and collaborate with designers and engineers to deliver features to millions of users. This role offers the chance to **level up your skills** while contributing to an open-source mission.

You'll lead the development of Mozilla's **privacy compliance infrastructure** and operationalize **scalable governance processes** for a global organization. Your core impact will be integrating privacy-by-design into enterprise systems and advising on evolving regulations. You'll thrive in a mission-driven, non-profit-backed tech company known for Firefox.

You'll improve Firefox development workflows to reduce time spent testing and debugging, working with a **geographically-distributed team**. You'll mentor others and collaborate on **code review and technical direction**. This role offers the chance to shape developer productivity at a **mission-driven, non-profit-backed company**.

You'll lead the development and implementation of **privacy compliance infrastructure** and scalable governance processes across Mozilla's global organization. Your core impact will be operationalizing **privacy-by-design principles** into enterprise systems and processes. This role offers the opportunity to work on cutting-edge privacy challenges in a mission-driven, non-profit-backed tech company.

You'll **build high quality user interfaces** for the Firefox browser with a focus on accessibility and usability. You'll **collaborate with designers and engineers** to implement new interfaces and solve complex problems. This role offers the chance to **impact hundreds of millions of users** worldwide.

You'll lead **hybrid-cloud infrastructure** design and reliability for **Mozilla's global systems**. Your work will directly impact scalability and security across IT, SRE, and security teams. This senior role combines hands-on technical execution with **cross-team technical direction**.

You'll join the **Firefox Application Security Team** to secure the web for hundreds of millions of users. You'll get **mentorship from seasoned security experts** and help **improve or automate security processes** using Python and C++. This role offers flexible hours and a chance to drive your own projects.

You'll work on **privacy features** for **Firefox** at **Mozilla**, a non-profit-backed tech pioneer. You'll own and deliver small-scale projects like **Copy Clean Link** and improve Protection UI surfaces. This remote role offers flexible hours and a chance to impact web privacy for millions.

You'll lead the intelligence function for Mozilla Foundation, synthesizing geopolitical and technology landscape signals into actionable insights. Your work will shape strategy for high-stakes engagements and global convenings. This senior individual contributor role offers high autonomy and a quiet profile, reporting directly to the VP.

You'll develop and execute grassroots fundraising campaigns for **Mozilla Foundation**, a non-profit building a better internet. You'll translate advocacy work into compelling fundraising opportunities to **mobilize a global community**. This role offers the chance to **shape donor engagement strategies** for a mission-driven organization.

You'll set Firefox Mobile's overall quality strategy, leading a distributed team of engineers and contractors to build test automation and observability tooling. You'll drive better development speed and product quality through deep partnership with Android, iOS, product, and UX teams. This role offers the chance to shape quality at scale for a privacy-focused browser used by tens of millions.

You will design, write, and maintain code for innovative iOS applications at Mozilla, working with a distributed team to build features that enhance user engagement and privacy. Your contributions will help shape the future of browsing on iOS.

You'll design and maintain sophisticated iOS applications for Mozilla's privacy-focused browser. Your work will directly impact millions of users, ensuring high-quality, open-source mobile experiences. You'll collaborate with a global team to shape the future of browsing on iOS.

You'll design and maintain sophisticated **iOS applications** using **Swift** and **SwiftUI**, collaborating with a distributed team to enhance user experience and privacy. Your work will directly impact millions of users through Firefox and other Mozilla products.

You'll **manage technical support tickets** for Thunderbird's subscription products and help users across community forums and app store reviews. Your core impact is resolving issues with care and clarity, contributing to product improvements and documentation. You'll be part of a **distributed open-source team** that values privacy and user control.

You'll improve Firefox development workflows to reduce time spent testing and debugging, working with a **geographically-distributed team**. Your work will **enable Firefox developers to deliver features faster** and **enhance developer productivity** across the organization.

You'll join a team that builds applications to develop, test, and deliver Mozilla's core products. You'll **improve Firefox development workflows** to reduce testing and debugging time, and **mentor other team members** while collaborating across a geographically-distributed team. This role offers the chance to **shape the next 25 years of technology** for a mission-driven, non-profit-backed company.

You'll improve Firefox development workflows and reduce debugging time. You'll collaborate with a globally distributed team to enhance developer productivity. This role offers the chance to work on open-source software for a mission-driven company.

You'll improve Firefox development workflows and CI systems to **reduce testing time and debugging effort**. You'll collaborate with a global team to **accelerate developer productivity** and make data-driven decisions. This role offers the chance to **impact millions of Firefox users**.

You'll join a team that builds tools to improve Firefox development workflows, reducing time spent on testing and debugging. You'll act as a force-multiplier, enabling developers to **deliver features faster** and **improve product performance**. This role offers mentorship and the chance to work on **open-source software** used by millions.

You'll improve Firefox development workflows by reducing test time and integrating automation. Your work will enable developers to ship features faster and more reliably as part of a distributed team. You'll collaborate across teams, provide code review, and use data to identify workflow trends.

You'll join the team that builds and improves tooling for Firefox developers, enabling them to land code daily. You'll design improvements to development workflows, reducing time spent testing and debugging, and help shape the next 25 years of technology at a mission-driven company. This role offers the chance to **work on CI/CD systems** and **mentor others** in a remote, distributed team.

You'll lead and unify Mozilla's global editorial vision and storytelling across platforms like Mozilla.org, social channels, and flagship publications. You'll act as a **strategic partner** to communications, product, and policy leads, orchestrating a shared narrative about Mozilla's work. This role sits at the intersection of **journalism, media, and technology**, requiring strong editorial judgment to translate complex ideas into compelling stories.

You'll own the analytical strategy for a major product area at Firefox, framing problems and defining how success is measured. You'll partner with product and engineering leadership to drive **data-informed decisions** that shape Firefox's growth trajectory. This role offers the chance to **mentor other data scientists** and set analytical standards across the team.

You'll own the analytical strategy for a major product area at Firefox, partnering with product and engineering to drive growth and shape the browser's trajectory. You'll identify **high-leverage questions**, define measurement frameworks, and translate data into clear recommendations that influence the roadmap. This role stands out for its blend of strategic influence and technical depth in a mission-driven, non-profit-backed company.

You'll help enterprise customers in the DACH region evaluate, validate, and deploy **Firefox Enterprise** in secure, regulated environments. Your core impact is driving technical wins, managing proofs of concept, and ensuring smooth deployments. You'll work with a mission-driven, non-profit-backed technology company.

You'll partner with Sales to support strategic enterprise opportunities across DACH, leading technical discovery and solution design. Your core impact will be helping enterprises evaluate, validate, and deploy **Firefox Enterprise** in secure, complex environments. This role stands out with deep engagement on **security controls**, **identity integration**, and **deployment architecture**.

You'll develop and lead Mozilla's 2026 brand campaign in France, operating at the intersection of global strategy and local execution. Your core impact will be to re-establish Firefox as a relevant, differentiated brand and drive user and market share growth. This is a **temporary 6-month role** focused on a **once-in-a-decade browser shift** in Europe.

You'll build and lead Mozilla's **UK regional marketing strategy** at the intersection of global strategy and local execution. You'll drive **Firefox growth** by embedding the brand in cultural moments and communities. This role is central to turning a **once-in-a-decade browser shift** into sustained user and market share growth.