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Contract Staff Software Engineer – WebCompat & Bug Triage
@ Mozilla
Remote in Canada
Overview
Mozilla is hiring a contract Software Engineer for WebCompat and bug triage on Firefox. The role reduces the backlog of site-breakage bugs by finishing or verifying diagnoses, writing interventions and simple AI-assisted fixes. Requires solid HTML, CSS and JavaScript, browser devtools skill and cross-browser diagnosis.
Responsibilities:
- Finish or verify diagnosis of long-tail WebCompat bugs
- Write WebCompat interventions where appropriate
- Write and land simple AI-assisted fixes
- Reproduce and triage incoming site-breakage reports
Requirements summary:
- Solid HTML, CSS and JavaScript skills
- Comfort debugging real-world site breakage
- Fluent with browser devtools and cross-browser diagnosis
- Comfortable using AI tooling
- Gecko knowledge a strong plus
Tools & skills
Source and dates
Employer career site / ATS feed · greenhouse
- Employer posting date
- 2026-10-06
- First seen by our source
- 2026-10-20
- Source record updated
- 2026-10-20
These dates describe the source record, not a live verification that the employer is still hiring. Check the original posting.
Job details
| Department | Software development |
| Travel | air: none · ground: none |
| Work setting | Office |
| Position | Mostly sitting |
| Physical demands | physical low · computer high |
| Languages | English |
Summary and details written by AI from the posting; the employer’s posting is the authority.
Mozilla
Saved company profile
Historical company information from a saved The Jobs API profile (LinkedIn/Crunchbase fields). It is not live-verified; figures may have changed. Missing values remain unknown.
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Full company description
A lot of companies say they’re “mission-driven.” Our unique corporate structure guarantees that every decision we make upholds our mission: to ensure the internet remains open and accessible. Beholden to neither shareholders nor investors, Mozilla Corporation is wholly owned by the not-for-profit Mozilla Foundation. Along with our communities of 20,000+ contributors and collaborators, Mozilla Corporation’s staff designs, builds, and distributes software that allows people to enjoy the internet on their own terms. Our flagship product — the Firefox browser — has expanded into a family of products that protects users and alerts them of risks, safeguards passwords and provides a secure VPN (with more to come). By maintaining a safe, open internet we're helping humanity, while also helping the individual humans employed here to reach their personal and professional goals. With a relatively small team serving hundreds of millions of people, a culture of exploration, and a commitment to mentorship, opportunities abound to learn and grow at Mozilla.
- LinkedIn followers
- 448,852
- People associated on LinkedIn
- 1,761
- Reported office locations
- 2 Harrison St, Suite 175, San Francisco, CA 94105, US
- 366 Adelaide St W, Suite 500, Toronto, Ontario M5V 1R9, CA
- Brewery Block 2 1120 NW Couch St., Suite 320, Portland, OR 97209, US
- 117/119, Quai de Valmy, Hall B, 7th Floor, Paris, Île-de-France 75010, FR
- Schlesische Straße 27, Berlin, 10997, DE
- Business categories
- Innovation Management
- News
- Content
- Software
- Non Profit
- Internet
- Privacy
- Browser Extensions
- Web Browsers
- Open Source
- Other recorded names
- Mozilla
- Specialties
- browser
- internet
- software
- mobile
- web apps
- OS
- identity
- android
- data science
- and open source
- Profile identifies a recruitment agency
- No
- Reported total investment
- 2,300,000
Currency and observation date were not supplied; this is not a current valuation or a funding round.
A lot of companies say they’re “mission-driven.” Our unique corporate structure guarantees that every decision we make upholds our mission: to ensure the internet remains open and accessible. Beholden to neither shareholders nor investors, Mozilla Corporation is wholly owned by the not-for-profit Mozilla Foundation. Along with our communities of 20,000+ contributors and collaborators, Mozilla Corporation’s staff…
| Field | Value |
|---|---|
| Industry | Software Development |
| Company size | 501-1,000 employees |
| Headquarters | San Francisco, CA |
| Organization type | Privately Held |
| Year founded | 2005 |
| Specialties | browserinternetsoftwaremobileweb appsOSidentityandroiddata scienceand open source |
| Open jobs on Jobsy | 14 |
| View page |
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.
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