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Mozilla

Contract Staff Software Engineer-Bug Burndown

MozillaΒ·2 days ago

⏰ Full-time🎯 Lead / PrincipalπŸ‡¨πŸ‡¦ CanadaπŸ“… Oct 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.

Market context

Measured from remote postings we have tracked ourselves β€” not self-reported survey data.

What Lead / Principal Engineering roles in Americas pay

25th
$169k
Median
$201k
75th
$237k

Based on 6,227 comparable postings with disclosed salaries, last 12 months.

How Mozilla is hiring

Last 90 days
137 roles
Total tracked
460
Hiring across
11 job families

Tracked since June 2025.

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