Jobs at Mozilla

Develop and maintain Firefox OS integrations across Windows, macOS, and Linux. Responsibilities include debugging defects, building features, maintaining installers and updaters, addressing security and memory-safety concerns, reviewing code, providing technical direction, and collaborating with distributed engineering teams.

Serves as the CEO’s strategic partner, translating priorities into organizational alignment and decision-ready actions. The Chief of Staff filters issues for CEO attention, supports executive leadership coordination, prepares the CEO for Board and external engagements, represents delegated authority, and aligns Investment Committee work with Foundation strategy. The role influences without formal authority, drives cross-functional priorities, manages high-stakes information, and supports governance, fundraising, and major organizational decisions.

Design, develop, maintain, test, and improve native iOS and iPadOS applications using Swift. Collaborate with distributed teams and product managers to build features, conduct code reviews, resolve bugs, automate quality assurance, and enhance user engagement. Contribute transparently to Mozilla’s open-source community and support product experiments and improvements.

Design, develop, test, and maintain native iOS and iPadOS applications using Swift. Collaborate with distributed engineering and product teams to build features, conduct code reviews, resolve bugs, run experiments, and improve application quality, stability, performance, and user engagement. Contribute transparently to Mozilla’s open-source community.

Lead day-to-day integrated marketing execution for Firefox in Japan during a six-month contract. Coordinate agencies across creative, media, creators and UGC; localize product messaging; manage campaign calendars, budgets, timelines and approvals; monitor performance and recommend optimizations using analytics, consumer research and cultural insights. Collaborate with global and local teams to drive brand awareness, acquisition and engagement, then document results and recommendations for future marketing efforts.

Provide technical leadership for Firefox Enterprise services and infrastructure. Develop administration and monitoring tools, improve security and enterprise deployment usability, integrate Firefox with remote services, and advise on roadmap priorities. Collaborate with geographically distributed engineering teams while building robust services using modern software engineering practices, databases, Rust, and JavaScript.

Develop and maintain Firefox Enterprise services, infrastructure, administration tools, monitoring tools, and remote-service integrations. Provide technical leadership, influence product priorities, and collaborate with geographically distributed engineering teams. The role requires strong software engineering fundamentals, robust service development, database knowledge, and proficiency in Rust and JavaScript, with Kubernetes, OIDC/OAuth2, frontend, and open-source experience as advantages.

Monitor and respond to global security incidents, lead incident response lifecycles, maintain alerts and automated workflows, conduct threat hunting, research threat intelligence, and improve security operations processes. The role participates in on-call rotation and collaborates with stakeholders to protect Mozilla products and users.

Monitor and respond to global security incidents, lead incident response lifecycles, maintain alerts and automated workflows, conduct threat hunting, manage threat intelligence, and improve security operations processes. The role participates in on-call rotations and collaborates with stakeholders to protect Mozilla products and users.

Analyze Gecko engine telemetry across desktop and Android to identify data-quality issues, including bot contamination and hardware noise. Build automated dashboards, audit telemetry collection gaps, develop data-sanitization methods, and produce statistical analyses connecting technical performance metrics with user behavior and engagement. Translate complex engineering data into actionable product and budget recommendations for leadership while working independently across Performance, Data, and Product teams.

Sells Mozilla’s digital advertising products to Fortune 500 brands and agencies across the UK and Europe. Responsibilities include developing client relationships, prospecting, managing sales pipelines, meeting revenue targets, presenting advertising solutions, analyzing campaign performance, maintaining CRM records, and communicating client feedback to product and marketing teams.

Develop and manage direct client and agency relationships across the UK and Europe, sell Mozilla’s digital advertising products, exceed revenue and logo targets, build sales pipelines, analyze campaign performance, maintain CRM records, and communicate customer feedback to product and marketing teams. The role requires strong digital media sales experience, major agency and brand relationships, knowledge of online media planning and performance advertising, and excellent communication and organizational skills.

Analyze Gecko browser-engine telemetry across Desktop and Android, building dashboards, auditing data collection, sanitizing bot and hardware-related noise, and producing statistical analyses linking technical performance to user behavior. The role translates engineering data into product and leadership insights, supports performance prioritization, and requires independent problem-solving across unfamiliar technical domains.

Analyze Gecko browser engine telemetry across Desktop and Android, build leadership dashboards, identify telemetry gaps, develop frameworks to remove bot and hardware noise, and correlate performance metrics with user behavior. The role requires advanced SQL, statistical analysis, data visualization, browser component knowledge, and independent problem solving to translate engineering data into product strategy.

Implement and ship Storage Encryption Everywhere in Firefox/Gecko, including schema migrations, encrypted data storage, integration and platform testing. Collaborate through code review, resolve specification questions, and shepherd the feature across Nightly, Beta, and Release. Diagnose and fix correctness, performance, and regression issues in a multithreaded browser-engine codebase while contributing openly through public bugs and upstream landing.

Design, build, deploy, and operate software, developer tooling, CI/CD systems, workflow automation, and cloud infrastructure supporting Firefox engineering. Own complex reliability, performance, observability, and cost-efficiency problems across software and operational layers. Collaborate across engineering, cloud, and IT teams; use telemetry and metrics to guide decisions; establish reusable technical standards; and contribute to open-source projects and AI-assisted development tools.

Develop privacy, anti-tracking, and phishing protections for Firefox and improve the Gecko browser engine. Build performant, low-latency, maintainable software in C++, JavaScript, and Rust while collaborating asynchronously with a distributed team. The role requires independently scoping and delivering complex features, with emphasis on memory safety, multithreaded architecture, data streams, web privacy, and browser security.

Designs, builds, deploys, and operates software, developer tooling, CI/CD systems, workflow automation, and cloud infrastructure supporting Firefox engineering. The role owns complex reliability, performance, observability, and cost-efficiency problems; uses telemetry and metrics for technical decisions; collaborates across engineering and IT; contributes to architecture, technical strategy, open-source projects, and AI-assisted development tools.

Design, build, deploy, and operate software, developer tools, CI/CD systems, workflow automation, and cloud infrastructure supporting Firefox engineering. Own complex reliability, performance, observability, and cost-efficiency problems across technical layers. Collaborate across engineering, cloud, and IT teams; use telemetry and metrics to guide decisions; contribute to architecture, technical strategy, open-source projects, and AI-assisted development tooling.

Develop privacy, anti-tracking, and threat-intelligence protections for Firefox. Improve the Gecko browser engine and build performant, low-latency C++, JavaScript, and Rust software. Independently scope and deliver complex features, contribute to browser architecture, and collaborate asynchronously with a distributed global team. The role focuses on privacy, phishing mitigation, memory safety, multithreaded systems, and web platform security.