Work with the WebCompat team to develop and enhance internal tooling: triage/reporting dashboards, metrics, and the broken-site-report screenshot capture and pipeline. Requires web development (JavaScript, HTML, CSS, Python & Django), familiarity with automation and web services, and collaboration with QA for reliable reporting and triage workflows.

Work on the Firefox DOM Core team to improve Session History test coverage and Gecko correctness. Responsibilities include writing Web-Platform Tests and Gecko mochitests, fixing failures, debugging in a large codebase, and collaborating via public bugs and code review. Required: substantial browser-engine experience (ideally Firefox/Gecko), strong C++ and JavaScript skills, and debugging/testing expertise.

Maintain and engineer Firefox’s Graphics area: fix bugs and regressions, upkeep tests, diagnose and fix graphics problems across Windows/macOS/Linux/Android, and perform code review and routine maintenance so senior engineers can focus on performance. Requires strong C++ and/or Rust, knowledge of graphics frameworks and GPU architecture, and experience debugging and optimizing multithreaded codebases.

Work independently at a tech-lead level to keep Firefox Layout code healthy: fix bugs and regressions, keep tests green, diagnose and fix layout issues across Windows, macOS, Linux and Android, perform code review, and participate in planning and web-compat/standards meetings. Strong C++, CSS and multithreaded debugging/optimization skills required; JavaScript/Rust and browser/web-standards experience are a plus.

Individual-contributor role to build and operate Mozilla’s Enterprise technical support: design workflows, escalation paths, SLAs, tooling and training; manage external vendors and procurement; lead major incident responses; partner with Product, Engineering, Sales, and Legal; and use metrics and forecasts to scale support globally. Requires 5+ years in B2B/Enterprise technical support or support operations and fluency in English and German.

Mozilla seeks a Staff Technical Support Manager to create and run its Enterprise technical support operation, including workflows, vendor management, escalation frameworks, incident response, training, and metrics. The role requires 5+ years of B2B/Enterprise technical support or support operations experience, technical troubleshooting skills, experience with tools such as Zendesk and Jira, and verbal and written fluency in German and English.

Work on feature development and architectural improvements across the Add-ons stack (DevHub, Reviewer tools, automated moderation). Build and operate production services with emphasis on reliability, CI/CD, observability, and developer platform tooling. Collaborate with engineers, reviewers, product, and community contributors; write design docs, ADRs, runbooks, and contribute in the open.

Work on AMO to deliver features and architectural improvements across submission flows, automated moderation pipelines, DevHub and Reviewer tools. The role involves Python/Django backend work, React/TypeScript frontend, MySQL, asynchronous processing, improving CI/CD and developer platforms, observability, incident response, and writing technical documentation (ADRs, runbooks).

Work on the addons.mozilla.org stack to deliver features and architectural improvements across DevHub, Reviewer tools and automated moderation pipelines. The role centers on Python/Django backend work, React/TypeScript front-end, CI/CD and platform reliability (observability, deployments, incident response), and contributing to internal developer platforms and engineering standards.

Join Mozilla's Add‑Ons team to deliver features and architectural improvements across AMO (DevHub, Reviewer tools, automated moderation). Role emphasizes Python/Django backend development, CI/CD and pipeline-as-code, observability (metrics, logging, tracing, SLOs), platform reliability, internal developer tooling, and production incident practices. Position is remote (UK) with a listed salary range of £66,000–£87,000.

Work on AMO systems including DevHub, Reviewer tools, automated moderation pipelines, and internal developer platforms. The role emphasizes Python/Django backend work, React/TypeScript frontend, CI/CD and infrastructure-as-code, observability and SRE practices, technical documentation, and contributing in the open.

Remote (Spain) Senior Software Engineer role on the Add-ons team to deliver features and architectural improvements across AMO (DevHub, Reviewer tools, moderation pipelines). Work includes backend and frontend development (Python/Django, React/TypeScript), improving CI/CD and infrastructure-as-code, building observability and reliability practices, and contributing in the open. Salary range listed: €58,000–€77,000 EUR (annual).

Join Mozilla’s Add-ons team to deliver features and architectural improvements across AMO (DevHub, Reviewer tools, automated moderation). Role centers on Python/Django backend, React/TypeScript frontend, CI/CD and infrastructure-as-code, observability, reliability and incident response. Hiring range for Remote Belgium: €56,000–€74,000 EUR/year.

Join the Add‑Ons team to deliver features and architectural improvements across AMO, DevHub, Reviewer tools, and automated moderation systems. The role involves Python/Django backend and React/TypeScript frontend work, improving CI/CD and observability, operating production services, and contributing in the open. Remote role based in Sweden; listed salary range: 512,925–683,900 SEK per year.

Mozilla Foundation seeks a Major Gifts Officer (remote in Canada, Germany, UK, or US) to identify, cultivate, solicit, and steward a portfolio of major donors capable of giving $50,000–$1M+. Responsibilities include personal solicitation and closing of major gifts, pipeline and moves management, documentation in Salesforce, designing stewardship activities and donor events, and partnering with prospect research and program/executive staff to develop tailored proposals. The role requires a proven track record of personally securing major gifts and strong CRM, proposal writing, and relationship-management skills.

Remote staff full-stack product engineer role at Thunderbird/Thunderbolt focused on building full-stack features, integrations, and customer-specific customizations for enterprise AI deployments. Requires 10+ years of software engineering experience, strong TypeScript/JavaScript and backend/API skills, experience with AI-enabled applications (LLMs, RAG, agents), and familiarity with enterprise deployment concerns (authentication, identity, self-hosted/hybrid infrastructure, observability). Role includes hands-on coding, supporting partner- and customer-hosted pilots and productions, and writing documentation and runbooks.

Lead portfolio planning, capital allocation, and governance; develop dashboards and reporting; coordinate cross-organization initiatives and operating forums; advise COO and Mozilla.org leadership. Requires 10+ years in multi-entity holding, investment management, private equity, VC, or similar portfolio role.

Mozilla is hiring a Staff Product Manager to define and drive the product strategy and roadmap for search in the Firefox Desktop browser (Windows, macOS, Linux). The role requires 5+ years of product management experience, familiarity with search and AI/ML products, strong analytical skills (including SQL), leading experimentation programs, and partnering with Business Development, Engineering, Research, and Design to deliver privacy-respecting, revenue-impacting search experiences. Listed US salary ranges: $139,000–$218,000 USD/year (tiered by location).

Lead product strategy and roadmap for search features in the Firefox Desktop browser, run end-to-end experimentation, define success metrics with Data Science, partner with Business Development on search partnerships, and collaborate with Engineering, Research, and Design to ship features. Requires 5+ years in product management, experience with search or AI/ML products, strong analytics and SQL skills, and experience driving revenue-impacting product areas while upholding privacy principles.

Hands-on senior mobile product manager role focused primarily on Firefox for iOS with contributions across Android. Responsibilities include improving core browser experience, optimizing new-user activation and retention via data and A/B testing, monitoring app health (App Store Connect, Google Play Console), supporting ASO and growth experiments, and adapting product for international markets. Role is remote (Finland) and offered as a permanent position.