Mozilla

Senior Software Engineer (Contract)

Full-time

15 days ago

Remote Germany

Mozilla is hiring a Senior Software Engineer for the Privacy Team to implement privacy-improving, anti-tracking features and data sanitization in the Firefox web browser, and to make architectural improvements to Gecko. The role involves writing performant C++, JavaScript and Rust code, working asynchronously with a distributed team. Requires a bachelor's degree or equivalent and at least 4 years' experience with C++ and Rust, strong memory-safety and multi-threaded architecture skills. Bonus experience includes browser engines, ML pipelines, Python, SQL and statistical modeling.

Front End Engineering Manager, Firefox Desktop

Full-time

22 days ago

Remote Canada

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.

Senior Manager, Firefox Mobile Test Engineering

€130,000 - €173,000 EUR per year

Full-time

26 days ago

Remote Germany

Lead and set quality strategy for Firefox Mobile, manage test automation engineering, observability (dashboards and automated reporting), and an exploratory testing program. Role requires 10+ years in test engineering with 5+ years in technical management. Position is remote (Germany). Hiring range listed: €130,000–€173,000 EUR per year.

Senior Manager, Firefox Mobile Test Engineering

£134,000 - £178,000 GBP per year

Full-time

26 days ago

Remote UK

Senior manager role to set and own Firefox Mobile quality strategy, lead test automation engineering and observability, run an exploratory testing program, and manage a distributed team in close partnership with Android/iOS engineering, Product, and UX. Requires 10+ years in test engineering including 5+ years in technical management; hands-on mobile testing and familiarity with frameworks like XCUITest or Espresso are beneficial.

Senior Manager, Firefox Mobile Test Engineering

€126,000 - €168,000 EUR per year

Full-time

26 days ago

Remote Spain

Lead and grow the Test Engineering team for Firefox Mobile (Android and iOS). Set overall quality and test strategy, manage engineers and contractors, oversee automation infrastructure and observability (dashboards, reporting), and run an exploratory testing program while partnering with Product, UX, and Android/iOS engineering. Requires 10+ years in test engineering with 5+ years in technical management.

Senior Strategic Account Executive, Firefox Enterprise (France)

€144,000 - €169,000 EUR per year

Full-time

34 days ago

Remote France

Mozilla seeks a Senior Strategic Account Executive for Firefox Enterprise to build pipeline and close complex enterprise deals across France and Belgium. Responsibilities include full sales-cycle ownership (prospecting through close), turning interest into pilots and support agreements, partnering with Solutions Engineering, and engaging senior IT, security, procurement, and compliance stakeholders. Role is remote in France, requires travel within France and occasional alignment with U.S. business hours. Hiring range for Remote France: €144,000–€169,000 EUR per year.

Senior Strategic Account Executive, Firefox Enterprise (France)

Full-time

34 days ago

Remote

Mozilla seeks a Senior Strategic Account Executive to build pipeline and close complex enterprise deals for Firefox Enterprise across France and Belgium. The role owns the full sales cycle, works closely with Solutions Engineering, engages senior IT/security stakeholders, and requires strong enterprise SaaS/infrastructure/security sales experience and fluency in French and English. Position is remote with required travel within France and occasional alignment with U.S. hours.

Integrated Marketing Manager - UK

Full-time

35 days ago

Remote UK

Responsible for building and leading UK marketing strategy and executions to drive brand relevance, consideration and user growth for Firefox. Role includes creating culturally relevant activations across sports, music and creator communities; translating global campaigns into UK executions; partnering with brand, product marketing, media, social, PR and creative teams; and working with insights/analytics to measure impact. Requires 8+ years of consumer/brand or cultural marketing experience.

Integrated Marketing Consultant - France

Full-time

35 days ago

Remote France

Temporary (6-month) role to develop and lead Mozilla's 2026 integrated brand campaign for France. Responsibilities include French market strategy, cross-functional collaboration with product/creative/media/PR/agencies, end-to-end campaign execution across owned/earned/paid channels, and measurement/reporting. Requires 8+ years of consumer/brand marketing experience and fluency in French and English.

Senior Mixed Methods User Researcher

CA$95,000 - CA$130,000 CAD per year

Full-time

40 days ago

Remote Canada

Lead mixed-methods user research for Firefox at Mozilla, conducting evaluative and foundational qualitative and quantitative studies, mentoring researchers, and partnering with product, design, engineering, and data science. Role emphasizes responsible use and critical evaluation of AI tools in research workflows. Position is remote within Canada and requests 4–6 years of UX research experience.

Senior Strategic Account Executive, Firefox Enterprise (DACH)

Full-time

41 days ago

Remote

Mozilla is hiring a Senior Strategic Account Executive for Firefox Enterprise to grow adoption across DACH (Germany, Austria, Switzerland). The role is remote and focused on developing new enterprise, regulated, and public-sector opportunities, owning the full sales cycle from prospecting to close, enabling pilots and rollouts, and partnering with Solutions Engineering and regional business development. Advanced written and verbal proficiency in German and English is required.

Senior Strategic Account Executive, Firefox Enterprise (DACH)

€167,000 - €195,000 EUR per year

Full-time

41 days ago

Remote Germany

Mozilla is hiring a Senior Strategic Account Executive for Firefox Enterprise to develop and close enterprise opportunities across DACH. The role owns the full sales cycle—prospecting through close—partners with Solutions Engineering, and engages senior IT, security, procurement, and compliance stakeholders. Strong experience in enterprise SaaS, infrastructure, security or platform sales and fluency in English and German are required.

Senior Solutions Engineer (DACH), Firefox Enterprise

Full-time

41 days ago

Remote

Customer-facing technical role partnering with Sales to lead technical discovery, solution design, pilots/POCs, and enterprise rollouts for Firefox Enterprise in DACH. Requires 7+ years in solutions/sales/technical architecture roles, deep enterprise security and endpoint/deployment expertise, and native-level German with strong English.

Senior Solutions Engineer (DACH), Firefox Enterprise

€81,000 - €108,000 EUR per year

Full-time

41 days ago

Remote Germany

Customer-facing Senior Solutions Engineer for Firefox Enterprise covering Germany, Austria and Switzerland. Responsibilities include technical discovery, solution design, workshops, pilots/PoCs, validating interoperability (SSO/MFA/IdP, SIEM, proxies, PKI, endpoint tooling), and creating reusable technical assets. Requires 7+ years in solutions/sales/architect roles, strong enterprise security and deployment experience, native-level German and strong English. Hiring range listed for Remote Germany: €81,000–€108,000 (annual).

Senior Software Engineer, WebExtensions

€53,000 - €71,000 EUR per year

Full-time

41 days ago

Remote France

Work on the WebExtensions platform in Firefox to implement and maintain extension APIs and addon management, debug and fix extension issues, build related UI features, and participate in open source workflows. Role requires 4+ years professional software development experience and strong proficiency with JavaScript, DOM APIs, HTML, and CSS; familiarity with browser architecture, API design, and distributed collaboration.

Senior Software Engineer, WebExtensions

€68,000 - €91,000 EUR per year

Full-time

41 days ago

Remote Germany

Work on the WebExtensions platform in Firefox: implement/maintain WebExtensions APIs and Addon Management, debug and fix extension issues, build related Firefox UI, collaborate with product/QA/AMO teams, participate in open-source workflows, and support extension developers. Requires 4+ years professional software development experience and strong proficiency in JavaScript, DOM APIs, HTML, and CSS. Bonus: Firefox internals, C++/Rust, Android/GeckoView, and web security experience.

Senior Software Engineer, WebExtensions

CA$95,000 - CA$139,000 CAD per year

Full-time

41 days ago

Remote Canada

Work on the WebExtensions platform in Firefox: implement and maintain WebExtensions APIs and addon management, build related user interfaces, debug extension issues, collaborate across product/QA/AMO teams, contribute to Mozilla-owned extensions and open source workflows. Requires 4+ years professional software development experience and strong JavaScript/DOM/HTML/CSS skills.

Senior Software Engineer, WebExtensions

£66,000 - £87,000 GBP per year

Full-time

41 days ago

Remote UK

Work on the WebExtensions platform to implement and maintain extension APIs and add-on management, debug extension issues, and build Firefox UI to manage extensions. Requires 4+ years of software development experience, strong proficiency in JavaScript, DOM APIs, HTML, and CSS, and familiarity with modern browser architecture and debugging tools. Bonus experience includes Firefox internals, C++/Rust, GeckoView/Android, web security, and open source contributions.

Head of Editorial + Platforms, Mozilla Ecosystem

$139,000 - $175,000 USD per year

Full-time

48 days ago

Remote US

Lead Mozilla’s global editorial strategy across Mozilla.org and associated digital channels; curate and commission content across formats (articles, video, social, newsletters); oversee Mozilla.org redesign and platform evolution; work across the Mozilla portfolio to align and amplify narratives on topics such as open-source AI and digital sovereignty; manage contributors, freelancers, and agency partners while operating in a matrixed environment.

Staff Data Scientist, Firefox

$138,000 - $218,000 USD per year

Full-time

55 days ago

Remote US

Join the Firefox Data Science team to define analytical strategy for a major product area: frame problems, define measurement and north-star metrics, design experiments and causal analyses, contribute to forecasting and growth modeling, and mentor other data scientists. Requires 8+ years experience, advanced SQL and Python, expertise in A/B testing and causal inference, and experience owning product metrics and influencing cross-functional stakeholders.