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
Mozilla Corporation is a non-profit-backed technology company that has shaped the internet for the better over the last 25 years. The company makes pioneering brands like Firefox, a privacy-minded web browser used by more than 225 million people monthly. Mozilla focuses on diverse areas including AI, social media, and security while maintaining its core mission to make the internet better for people. The company is wholly owned by the non-profit 501(c) Mozilla Foundation, meaning it is not beholden to shareholders. Along with thousands of volunteer contributors worldwide, Mozilla designs, builds, and distributes open-source software that enables people to enjoy the internet on their terms.
