CALLTECH CONNECTYour privacy choices

Privacy policy

CallTech Connect
Join free
← Back to Connect Jobs
SOURCE CHECKED

Contract Software Engineer - DOM Core Firefox/Gecko

mozilla

Worldwide · On-site · Posted Oct 16, 2026

Create your free job-seeker profileGet matched to roles like this. Free, no card needed.
FREE JOB ALERTS

Get alerts for Contract Software Engineer jobs in Worldwide

One email when new matching roles go live on CallTech Connect. Unsubscribe any time.

ROLE OVERVIEW

About this role

Read the essentials first, then expand the complete employer description for more detail.

QUICK READ

Connect role summary

Automatically condensed from the published description; check the original employer listing before applying.

  • 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.
  • 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
Read the complete job description

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:

  • 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.

Find Jobs in Netherlands on Arbeitnow

LOCATION
Worldwide
WORK MODE
On-site
JOB TYPE
Not specified
POSTED
Oct 16, 2026
CLOSING
Nov 30, 2026

Source: arbeitnow

MORE JOBS LIKE THIS

More Contract Software Engineer jobs

Browse all matching jobs →