Posted last month
Contract Staff Software Engineer-FireFox Layout
@ Mozilla
Remote in Canada
Overview
Mozilla is hiring a contract software engineer to take on ongoing maintenance and routine engineering in Firefox's Layout area (CSS, page layout, APZ, text, images). The role works independently at a tech-lead level to keep a large codebase healthy. Pay is listed as $185,045 to $217,700 CAD in Canada Tier 1 locations and $131,400 to $154,600 CAD in Tier 2 locations.
Responsibilities:
- Fix bugs, regressions and incoming Layout issues
- Diagnose Layout problems across platforms
- Carry code review and routine upkeep
- Join planning and standards meetings as needed
Requirements summary:
- Strong C++, with JavaScript or Rust a plus
- Solid CSS and page-layout knowledge
- Strong debugging in a multithreaded codebase
- Able to work independently and lead technically
Tools & skills
Source and dates
Employer career site / ATS feed · greenhouse
- Employer posting date
- 2026-09-22
- First seen by our source
- 2026-10-08
- Source record updated
- 2026-10-10
These dates describe the source record, not a live verification that the employer is still hiring. Check the original posting.
Job details
| Seniority | Senior |
| Department | Software development |
| Work setting | Office, Home |
| 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
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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 take on the ongoing maintenance and routine engineering work in Firefox’s Layout area (CSS, page layout, APZ, text, images). Working independently at a tech-lead level, you keep the Layout code healthy.
Responsibilities
- Own day-to-day Layout maintenance: fix bugs and regressions, keep tests green, handle incoming issues.
- Diagnose and fix Layout problems across platforms (Windows, macOS, Linux, Android).
- Carry code review and routine upkeep so the FTE engineers can focus on other mission critical projects. .
- Join planning and standards / web-compat meetings as needed.
Definition of done
A healthy Layout area, backlog and regressions kept down, with the team’s senior engineers freed to focus on critical Performance and Security issues.
Required qualifications
- Strong C++ (JavaScript and/or Rust a plus).
- Solid CSS and page-layout knowledge.
- Strong debugging and optimization in a multithreaded codebase.
- Able to work independently and lead technically in a large, mature codebase.
Preferred
- Prior experience in web browser architecture and development.
- Prior Web standards experience.
- Mobile web development, profiling and debugging skills a plus.
- Proven experience in utilization of AI tools (Claude, ChatGPT, etc.) in the investigation, development, debugging, and/or testing of code is a plus.
Hiring Ranges:
Canada Tier 1 Locations
$185,045—$217,700 CAD
Canada Tier 2 Locations
$131,400—$154,600 CAD
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