Staff Software Engineer-Bug Burndown
Mozilla · Remote Canada; Remote Germany; Remote UK · posted Oct 6, 2026
Open to candidates in Canada, Germany and United Kingdom
staff
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What this role actually asks for
Extracted by RemoteHuntMust have
- •Web development (HTML, CSS, JavaScript)
- •Debug real-world site breakage
- •Browser devtools
- •Cross-browser diagnosis
- •Use AI tooling for diagnosis and fixes
Nice to have
- •Gecko knowledge
- •WebCompat experience
- •Web-standards experience
Tools and technologies
HTMLCSSJavaScript
The full posting
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.
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