Contract Staff Software Engineer

Mozilla Remote Canada

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Posted 06 Oct 2026

Last seen 23 Oct 2026

Location Remote Canada

Lifecycle mature

Grade D

Why this grade This listing scored 46/100, which is a D. It lost the most ground on pay transparency. See the breakdown

Remote clarity 15 / 15 Whether "remote" means anywhere, or is quietly restricted to one country.
Description depth 14 / 20 How much the posting actually says about the work, measured in characters of real text.
Freshness 12 / 15 How recently it was posted. Older postings are likelier to be filled or abandoned.
Corroboration 5 / 10 Whether more than one source carries this listing.
Role specificity 0 / 10 Whether the listing is tagged well enough to tell what the role actually is.
Pay transparency 0 / 25 A published salary range, worth more than any other single factor because it is what a candidate cannot find out without applying.

Every figure above is arithmetic over the posting itself — its salary field, its text, its age, its tags and how many sources carry it. How the grades work →

Description review

67/100 HR standards 72/100 Title ↔ description 76/100 Fit to the official role

Read the marked-up listing →

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.

Apply for this role Opens job-boards.greenhouse.io — the employer's own page, as linked by the source that listed this role

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Where this listing came from

23 Oct 2026 Ats Boards first sighting

Seen on 1 board over 0 days.