YOUR NEXT OPPORTUNITY
Contract Staff Software Engineer-FireFox Layout
Mozilla
Employer posted: September 22, 2026. Source checked: October 16, 2026 9:58 am. Availability and final application requirements are confirmed on the employer’s site.
Source: Mozilla — company careers. WorkerEra lists this opportunity from an external source; confirm current details with the employer.
About this opportunity
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:
Imported source listing. Details are supplied by the source and have not been independently verified by WorkerEra. Confirm the current vacancy on the employer’s page.
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- Read the linked employer announcement and compare its requirements with your experience.
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- Salary was not supplied in the listing fields; ask the employer about compensation.
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