Staff full - stack engineer building Thunderbolt, Thunderbird’s open - source enterprise AI client. Shipping integrations, customizations, and deployments for technical partners and enterprise customers.
MO
Mozilla
Currently Hiring
About the company
A lot of companies say they’re “mission-driven.” Our unique corporate structure guarantees that every decision we make upholds our mission: to ensure the internet remains open and accessible.
Beholden to neither shareholders nor investors, Mozilla Corporation is wholly owned by the not-for-profit Mozilla Foundation.
Along with our communities of 20,000+ contributors and collaborators, Mozilla Corporation’s staff designs, builds, and distributes software that allows people to enjoy the internet on their own terms.
Our flagship product — the Firefox browser — has expanded into a family of products that protects users and alerts them of risks, safeguards passwords and provides a secure VPN (with more to come).
By maintaining a safe, open internet we're helping humanity, while also helping the individual humans employed here to reach their personal and professional goals.
With a relatively small team serving hundreds of millions of people, a culture of exploration, and a commitment to mentorship, opportunities abound to learn and grow at Mozilla.
Open jobs
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62 jobs found
Staff engineer leading architecture and development of scalable web services for Thunderbird’s privacy - focused email ecosystem. Shaping products, analytics, technical direction, and engineering practices.
Staff software engineer shaping scalable web services for Thunderbird, an open - source privacy - focused email and productivity platform. Leading architecture, prototypes, analytics, and technical direction.
Senior Software Engineer owning backend services, cloud infrastructure, and production reliability for Mozilla’s privacy - focused open - source internet products. Leading development across Python, TypeScript/Node.js, or Rust systems.
Contract Front End Engineer implementing Firefox screen - sharing UX improvements. Building tested, accessible browser UI for Mozilla’s web conferencing features.
Contract Senior Software Engineer diagnosing WebGL bugs in Mozilla Firefox's Gecko engine. Improving graphics functionality and security through tested C++/Rust fixes.
Contract Staff Software Engineer maintaining Mozilla Firefox Layout code at Mozilla. Fixing cross - platform bugs, regressions, and performance issues across CSS and page layout systems.
Contract Staff Software Engineer maintaining Mozilla Firefox rendering, compositing, canvas, and WebGL. Debugging cross - platform graphics issues in Mozilla’s mature C++ and Rust codebase.
Senior Staff Product Manager building Firefox’s secure browser - control platform at Mozilla. Defining WebDriver BiDi strategy, AI assistant integrations, and user safety controls.
Staff Designer building prototypes and front - end experiences for Thunderbird’s open - source Thunderbolt AI client. Shaping trustworthy, accessible, enterprise - ready workflows and reusable interaction patterns.
Staff Product Manager shaping privacy - focused AI search experiences for Mozilla’s Firefox browser. Driving search strategy, experimentation, partnerships, engagement, and revenue across desktop platforms.
Senior Staff Performance Engineer optimizing Mozilla’s Firefox browser. Profiling bottlenecks, improving benchmarks, and guiding performance engineering across a distributed team.
Senior Engineering Manager scaling Mozilla’s open - source Thunderbolt AI product. Leading engineering execution, people management, and production readiness for enterprise adoption.
Mozilla, an open - source internet technology company, seeks a lifecycle marketing operations manager for Firefox Mobile growth in Canada. Coordinating ASO, campaigns, launches, localization, reporting and AI - assisted workflow automation.
Release engineer optimizing build and deployment pipelines for Mozilla’s open - source Firefox browser. Scaling software delivery, improving developer experience, and supporting reliable releases across platforms.
Mozilla release engineer optimizing Firefox build, test, and deployment pipelines at global scale. Improving developer experience, maintaining automation, and responding to critical service outages without an on - call rotation.
Brand copywriter simplifying complex technology and policy ideas for Mozilla Foundation campaigns. Creating clear, compelling copy across web, email, social, video, and paid channels.
Engineering Manager leading distributed teams improving Mozilla Firefox Desktop user experiences. Driving frontend innovation, quality software delivery, and cross - functional collaboration for an open - source browser.
Senior iOS Engineer building Thunderbird’s privacy - focused email application for Canadian users. Improving mobile architecture, reliability, security, and performance within an open - source ecosystem.
Senior iOS Engineer developing Thunderbird’s privacy - focused mobile email application. Improving architecture, performance, security, and reliability for millions of open - source users.