Contract Staff Software Engineer-Bug Burndown

Canada, Germany, United Kingdom
Remote
Posted Oct 8, 2026
1 position

Opens an external site

Employment type: Full-time
Experience level: Senior · 5+ years
Posting language: English
Working hours: 40 hours per week

Job summary

You will be responsible for diagnosing and resolving the backlog of WebCompat bugs to improve Firefox site compatibility. This involves reproducing issues, writing interventions, and utilizing AI-assisted tools to implement fixes.

Job details

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.

What you’ll do

Requirements

Candidates must have solid web development skills including HTML, CSS, and JavaScript, along with experience in browser debugging. Familiarity with Gecko and web standards is preferred but not strictly required.