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

Mozilla; United States; Remote; USD 120,000 - 180,000; Full time

Job summary

Mozilla's Firefox DOM Core team looks for an engineer to help improve the health of the Session History area by writing and maintaining tests, and by fixing issues to boost Gecko correctness. You will develop Web-Platform tests and Gecko mochitests, collaborate through code reviews, and help drive changes to landing.

This role emphasizes automation, debugging, and open-source collaboration. Ideal candidates have browser-engine experience, strong JavaScript skills for testing, and solid C++

Qualifications

• Experience in a browser-engine codebase or automating for a browser-engine, ideally Firefox/Gecko.
• Solid JavaScript and applying that language skill 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.

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

Skills

JavaScript

C++

Testing

Debugging

Job description

The roleYou 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

Definition of doneImproved 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 and applying that language skill to write automated tests.
• 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.

Preferred

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