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Contract Software Engineer - DOM Core Firefox/Gecko

Mozilla · Remote France; Remote Germany; Remote UK · All 5 Mozilla jobs

This is one of 201 live Software Engineer jobs in Remote TUNAI is tracking right now.

Work pattern
Remote
Employment
Contract
Posted
22 Sep 2026

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Required skills, as the advert states them

  • JavaScript
  • C++

Nice to have

  • Security

About this opportunity

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…

Read the full advert and apply on Mozilla's site →

Collected from Mozilla's own careers site (Greenhouse). Posted 22 Sep 2026. TUNAI shows an excerpt and the facts it read from the advert; the employer's page has the full description and the application.