Build your AI headhunter →

Senior Contract Software Engineer (JavaScript) - Firefox

Mozilla
Location: UK Posted on: 29 October 2026
Remote
🎯 Senior🏠 Remote🧭 Backend🏢 SaaS🗣️ English
Required skills
c++javascriptqa

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

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

Preferred

Interested in this job?

Upload your CV on tailk.me: when you apply, your AI runs the interview for you and prepares your cover letter.

Build your AI headhunter and apply

Related listings

Senior Analyst - BCG Vantage, Infrastructure, Transport, and City Development (P-ITC)
Boston Consulting Group
Senior Media Strategist
Onward Search
Senior Field Service Systems Engineer (UK)
Raytheon
Senior Electrical Designer
Onward Search
Senior Software Engineer
Onward Search
Senior Civil Engineer
Onward Search