Contract Staff Software Engineer-FireFox Layout
- Company: Mozilla
- Location: Remote Canada
- Work mode: Remote
- Job type: Full-Time
- Posted: 2026-09-22
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