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Posted 2 h ago

Contract Staff Software Engineer-Bug Burndown

Mozilla·Remote UK·via Greenhouse

Posted by Mozilla on 20 October 2026. Still on their Greenhouse board when we checked 3 min ago. Half of Mozilla's roles come down within 43 days.

What the posting is about

Reduce Firefox's WebCompat bug backlog by diagnosing and fixing site-breakage bugs. Utilize AI tools to speed up the process. Reproduce and triage incoming reports. Gecko knowledge is a plus.

Read out of the posting
LevelNot stated
Experience askedNot stated
EmploymentContract
LocationRemote UK
RemoteYes
Visa sponsorshipNot stated
SalaryNot published, and most postings do not
Posted2026-10-20
Found viagreenhouse, direct from their system

We had it within the hour it went up.

The posting, as the company wrote it
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.

Copied from Mozilla’s own board, not rewritten. Original ↗

Also open at Mozilla

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