Use HTML, CSS, and JavaScript to reduce Firefox’s WebCompat backlog as a Contract Staff Software Engineer focused on site-breakage diagnosis.
Mozilla seeks a Staff Software Engineer for WebCompat bug triage and easy fixes. You will diagnose long-tail bugs, verify existing diagnoses, and write interventions or AI-assisted fixes. The work turns reported breakages into actionable or fixed bugs.
Key Responsibilities: Finish diagnosing long-tail WebCompat bugs
Verify diagnoses for site-breakage reports
Write WebCompat interventions where appropriate
Write and land simple AI-assisted fixes
Reproduce and triage incoming breakage reports
Requirements: Solid HTML, CSS, and JavaScript development skills
Fluency with browser developer tools
Comfort diagnosing cross-browser site breakage
Comfort using AI tooling for diagnosis and fixes
Prior WebCompat or web-standards experience
Apply web development, browser debugging, and AI-assisted fixing skills to Firefox WebCompat diagnosis and bug backlog reduction at Mozilla.

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📌 WebCompat Staff Software Engineer (Quebec City)
🏢 Mozilla
📍 Quebec City