Senior Contract C++ / JavaScript Software Engineer Firefox (Browser Engine) - Mozilla

The Role

You will help the Firefox DOM Core team improve the health of the Session History area. You will write tests to improve coverage and fix tests and/or problems to improve Gecko correctness.

Responsibilities

• Write Web-Platform tests to improve coverage, and Gecko mochitests as needed.
• Fix problems and pass tests to improve Gecko correctness.
• Work through code review with relevant Gecko module owners and iterate to landing.

Definition of Done

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

• Substantial experience in a browser-engine codebase or in automating for a browser-engine, ideally Firefox/Gecko.
• Solid JavaScript skills and experience applying that language to write automated tests.
• Proficiency in and experience developing software in C++.
• Strong debugging skills in a mature, large codebase.
• Comfort working in the open: public bugs, code review, and upstream landing.

Preferred Qualifications

• Prior contributions to Gecko or another major browser engine.
• Familiarity with web standards and Web Platform Tests.