Staff Software Engineer-Bug Burndown

    ~$117,408 - $218,043Market Estimate
    Remote Canada; Remote Germany; Remote UK
    Full-Time
    Senior (7+ yrs)
    Engineering & Development
    Posted on October 6, 2026

    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.

    Company:  Mozilla

    Develops open-source internet technologies and advocates for online privacy and standards.
    Remote-First Company
    501-1000 employees
    Software & IT Services
    HQ: United States