Contract JavaScript Test Engineer for Browser Engine

Mozilla; United States; Remote; USD 120,000 - 170,000; Full time

Job summary

Mozilla in the United States is seeking an experienced browser-engine specialist to help the Firefox DOM Core team improve Session History health. You will write and maintain automated tests, fix failing tests, and collaborate with Gecko module owners to raise test coverage and correctness across the codebase.

You should bring substantial experience in browser-engine development, strong JavaScript and C++ skills, and a track record of debugging large codebases.

Qualifications

• Extensive experience in a browser-engine codebase or automation for a browser engine.
• Strong JavaScript skills applied to automated tests.
• Proficient in C++ with strong debugging abilities.
• Familiarity with Web Platform Tests and web standards.
• Contributions to Gecko or another browser engine preferred.

Responsibilities

• Write Web-Platform tests to improve coverage.
• Develop Gecko mochitests as needed.
• Fix failing tests and improve correctness across the codebase.
• Collaborate through code review with Gecko module owners.
• Iterate changes through the landing process with the team.

Skills

Browser-engine expertise

Automation for browser-engine

JavaScript

C++

Debugging

Public bugs/code review

Gecko familiarity

Web Platform Tests

Tools

Gecko mochitests

Web Platform Tests

C++ debugging tools

Job description

Mozilla in the United States is seeking an experienced browser-engine specialist to help the Firefox DOM Core team improve Session History health. You will write and maintain automated tests, fix failing tests, and collaborate with Gecko module owners to raise test coverage and correctness across the codebase.

You should bring substantial experience in browser-engine development, strong JavaScript and C++ skills, and a track record of debugging large codebases.