About the role
Contract Staff Software Engineer-Bug Burndown at Mozilla in Remote UK. Remote. Posted October 20, 2026.
You will help reduce Firefox’s WebCompat bug backlog by finishing or verifying the diagnosis of the long tail of site-breakage bugs, and by writing interventions or simple fixes (often with AI assistance). You turn a large queue of reported breakages into diagnosed, actionable, or fixed bugs.
Responsibilities
- Finish diagnosing, or verify the diagnosis of, long-tail WebCompat bugs.
- Write WebCompat interventions where appropriate.
- Write simple fixes (AI-assisted) and land them.
- Reproduce and triage incoming site-breakage reports.
Required qualifications
- Solid web development (HTML, CSS, JavaScript) and comfort debugging real-world site breakage.
- Fluent with browser devtools and cross-browser diagnosis.
- Comfortable using AI tooling to speed up diagnosis and fixes.
Preferred
- Gecko knowledge is a strong plus (but can be taught).
- Prior WebCompat or web-standards experience.
Prefer to apply yourself? Apply on Mozilla’s site
Quick answers
Is this job remote?
Yes, this is a remote role for candidates in GB.
How do you apply?
Apply on Mozilla’s site using the link on this page. With a free Jobmagic account you can see how well you fit first.
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