# Contract Staff Software Engineer-Bug Burndown at Mozilla

- Company: Mozilla
- Status: Open
- Workplace: Remote
- Location: Remote UK
- Level: Staff
- Discipline: Backend
- Employment: Contract
- Posted: 2026-10-20
- Skills: AI, WebCompat
- Apply: https://job-boards.greenhouse.io/mozilla/jobs/8303335

## Description

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.

More Mozilla roles: https://deviantjobs.com/companies/mozilla