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.
Write Web-Platform tests and Gecko mochitests to improve Session History coverage and correctness.
Fix test failures and bugs to improve Gecko correctness, working through code review with module owners.
Collaborate with the Firefox DOM Core team to improve the health of the Session History area.
Mozilla builds the Firefox browser and champions a healthy, open internet. It is a global, mission-driven organization known for its commitment to privacy and open source software.
Build and improve WebCompat dashboards (triage, reporting, and metrics).
Improve the broken-site-report screenshot capture and pipeline.
Work with the WebCompat team (including QA) to turn reporting and triage needs into reliable tooling.
Mozilla is a mission-driven technology company known for the Firefox browser, championing an open and accessible internet. It fosters a collaborative, remote-first culture with a focus on privacy and community.
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.
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.
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.
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.