Contract Staff Software Engineer-Bug Burndown
Mozilla
Industry
Computer Software
Location
United Kingdom
Work mode
Remote
Job type
Contract
Annual salary
Not specified
Minimum experience
7+ years
Posted
20th October, 2026
Required skills
Artificial IntelligenceHTMLCSSJavaScript
About the role
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.
- 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.
- Gecko knowledge is a strong plus (but can be taught).
- Prior WebCompat or web-standards experience.
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