Contract Staff Software Engineer-Bug Burndown
Mozilla · UK wide
Contract Staff Software Engineer-Bug Burndown at Mozilla, across the UK. This is a contract role.
- Salary
- Competitive
- Location
- UK wide
- Contract
- Contract
- Posted
- 3 hours ago
- Closes
- 19 Nov 2026
- Sector
- Software Developer
Reference 8303335
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.
Reference: 8303335 · Posted 3 hours ago · Closes 19 Nov 2026 · Listed via Mozilla
Apply for this job
This role is listed via Mozilla. Applications are handled on the employer's site.
Apply on employer siteOpens the employer's website in a new tab.
Safe applying: a genuine employer will never ask you to pay for a DBS check, training or equipment, or move you onto WhatsApp before you are hired. If this listing does, report it and do not pay anything.