Contract Software Engineer - DOM Core Firefox/Gecko

Mozilla-Corporation; Greater London; Remote; GBP 70,000 - 110,000; Full time

Job summary

Mozilla-Corporation in the United Kingdom seeks a Contract Software Engineer to join the DOM Core Firefox/Gecko team remotely. You will write tests, fix failing cases, and help improve Gecko health and test coverage.

You will collaborate through public bugs and code reviews, working with the Gecko team to land changes in a mature Mozilla codebase. This role involves remote work across Europe and the UK.

Qualifications

• Proficiency in C++ development and debugging in a large codebase.
• Comfort working with public bugs, code reviews, and upstream landing.
• Familiarity with Web Platform Tests is a plus.

Responsibilities

• Write Web-Platform tests to improve coverage and Gecko mochitests as needed.
• Fix problems and pass tests to improve Gecko correctness.
• Engage in code reviews with Gecko module owners and iterate to landing.

Skills

C++ development

Debugging large codebase

Open source collaboration

Tools

Web Platform Tests

Job description

Contract Software Engineer - DOM Core Firefox/Gecko

Remote France; Remote Germany; Remote UK

The role

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

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

• 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

• Familiarity with web standards and Web Platform Tests.