Contract Staff Software Engineer-Bug Burndown

Mozilla·Remote Germany·Remote·Posted 20 October 2026

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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. 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.

This is a summary of the advert. The full description and the application are on Mozilla's careers site.

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