Design browser engine experiments to evaluate performance, correctness, and developer tooling.
Build engine-level prototypes for reliable programmatic interaction with dynamic web content.
Collaborate with the technical lead to assess trade-offs and shape new browser product direction.
Jobgether is an AI-powered job matching platform that connects candidates with hiring companies through skills-based screening. This role is posted on behalf of a partner company exploring browser technology with a small, technically focused team.
Implement Storage Encryption Everywhere in Gecko, including schema migrations and private browsing mode data storage.
Write and pass Web Platform Tests and add Gecko tests while iterating through code review with module owners.
Drive the feature through Nightly, Beta, and Release, fixing correctness, performance issues, and regressions.
Mozilla builds Firefox and other software that promote an open, private, and accessible internet. It is a mission-driven, globally distributed organization with a culture of transparency, open source contribution, and user trust.
Diagnose and verify the long tail of WebCompat bugs to reduce Firefox's site-breakage backlog.
Write WebCompat interventions and simple fixes, often with AI assistance, and land them.
Reproduce and triage incoming site-breakage reports from users.
Mozilla is a nonprofit organization behind the Firefox browser and champion of internet health and privacy. It operates as a global, distributed team with a culture of openness, inclusivity, and innovation.
Diagnose and verify the long-tail of WebCompat bugs to reduce Firefox's site-breakage backlog.
Write WebCompat interventions and simple, AI-assisted fixes to resolve reported breakages.
Reproduce and triage incoming site-breakage reports while using browser devtools.
Mozilla is the company behind the Firefox browser and a global mission to keep the internet open and accessible to all. The company employs a geographically distributed team and values innovation, collaboration, and user privacy.
Investigate complex web compatibility issues across browser platforms and determine root causes.
Reverse-engineer obfuscated JavaScript and design durable fixes across Mac, Windows, iOS, and Android.
Lead incident response and automate diagnostics using LLM-based tooling.
They focus on making websites work reliably across modern browser environments and platforms. The environment is remote-first, highly autonomous, and built around end-to-end ownership of complex technical projects.
Develop and maintain Firefox features for installs, updates, and OS integrations.
Solve platform-specific challenges on Windows and macOS with guidance from senior engineers.
Participate in code reviews, identify bugs, and contribute to an inclusive, distributed team.
Mozilla is a non-profit-backed technology company that builds the Firefox browser and other internet products, with a mission to make the internet better for people. With over 225 million monthly users and a distributed, open, and inclusive culture, the company focuses on AI, social media, and security.
Lead technical architecture and drive complex projects.
Write code, build prototypes, and contribute throughout the development lifecycle.
Mentor engineers through code review and technical discussions.
Thunderbird is one of the world's most trusted open-source email applications, empowering over 20 million people. Our small but growing distributed team includes more than 65 people across seven countries.
Design, build, and ship cutting-edge security and hardening features for Firefox's enterprise users.
Advance Firefox's security architecture across multiple operating systems, including privilege isolation, trust boundaries, and cryptographic protocols.
Collaborate with distributed teams to investigate security issues and improve reliability, performance, and memory usage in a complex, multithreaded environment.
Mozilla is a non-profit-backed technology company that makes Firefox, a privacy-minded web browser, and other internet innovations. With 225 million monthly users, we are a mission-driven team focused on making the internet better for people.
Implement tracker blocking that stops hidden trackers on every site without slowing page loads.
Bring VPN and Personal Information Removal into the browser through the DuckDuckGo subscription.
Catch startup and responsiveness regressions automatically, so the browser stays fast as it grows.
We're DuckDuckGo, the online protection company on a mission to raise the standard of trust online. We're a remote-first team of 400+ that's been profitable since 2014, with annual revenue over $100m and a culture of trust, inclusivity, and empowered project management.