Software Engineer - DOM Core Firefox/Gecko
Job in
Greater London, London, Greater London, W1B, England, UK
Listed on 2026-10-02
Listing for:
Mozilla-Corporation
Contract
position Listed on 2026-10-02
Job specializations:
-
Software Development
Software Testing, Software Engineer, Remote Software Developer, Backend Developer
Job Description & How to Apply Below
Location: Greater London
Contract Software Engineer - DOM Core Firefox/Gecko
Remote France;
Remote Germany;
Remote UK
You will help the Firefox DOM Core team improve the health of the Session History area. You will write tests to improve the coverage; you will fix tests and/or problems to improve the Gecko correctness.
Responsibilities- Write Web-Platform tests to improve the coverage, and Gecko mochitests as needed
- Fix the problems and pass the tests to improve the Gecko correctness
- Work through code review with the relevant Gecko module owners and iterate to landing
Improved Session History test coverage and code correctness in Gecko, measured by passed test cases, allowing the team’s senior engineers to focus on security, performance and strategic projects.
Required qualifications- Proficiency in and experience developing software in C++.
- Strong debugging skills in a mature larget codebase.
- Comfort working in the open: public bugs, code review, and upstream landing.
- Familiarity with web standards and Web Platform Tests.
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