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Staff Software Engineer - Web Compatibility

Mozilla Corporation — United Kingdom · Posted ~19 hours ago

Lead

Skills

HTML CSS JavaScript browser DevTools cross-browser debugging web development bug triage Gecko

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Summary ✨ AI‑Generated

Join a browser engineering team as a Staff Software Engineer focused on web compatibility. You will diagnose long-tail website breakages, reproduce and triage reports, implement targeted interventions and simple fixes, and use AI-assisted tools to accelerate debugging and resolution.

Highlights

Help improve web compatibility by diagnosing and fixing difficult real-world browser issues. The role offers staff-level ownership, hands-on debugging, AI-assisted development, and the opportunity to improve how websites work across browsers.

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.