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Contract Software Engineer - DOM Core Firefox/Gecko

💼 Contract🗓 2026-09-22 → 2026-09-26

Core

Improve the health of the Session History area in Firefox by writing tests, fixing problems, and ensuring Gecko correctness.

Role type

Contract Software Engineer (Browser Engine)

Builds

Firefox browser engine components

Domain

Web Platform / Browser Engine

Deliverable

production ML models | product features | dashboards & analysis | research | client delivery | infrastructure | physical/clinical work

Required skills

C++ development, JavaScript (for automated testing), debugging in large codebases, code review, Web-Platform testing, Gecko mochitests

Preferred skills

Prior contributions to Gecko or major browser engines, familiarity with Web standards and Web Platform Tests

Technologies

C++, JavaScript, Gecko, Web-Platform Tests, mochitests

Responsibilities

Write Web-Platform tests to improve coverage, fix problems to improve Gecko correctness, work through code review with module owners

Seniority

Mid-level, hands-on IC

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