Contract Staff Software Engineer-Bug Burndown

Mozilla

Remote Germany
Remote
Posted 2026-10-20

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Skills named in this job

CSS
HTML
JavaScript

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Questions you are likely to be asked

Why do you want to join Mozilla?
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Describe a time a deadline forced a trade-off in quality. What did you choose and why?
How would you design an API for a feature you have worked on?
What do you do when a production issue happens on your code?

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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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Listed on greenhouse · posted 2026-10-20. ApplySarthi collects openings and links to application pages; the role is advertised by Mozilla, not by us.