# Contract Staff Software Engineer-FireFox Layout at Mozilla

Contract Staff Software Engineer-FireFox Layout at Mozilla in Remote Canada. Remote. Posted September 22, 2026.

- Company: Mozilla
- Location: Remote Canada
- Workplace: Remote
- Posted: 2026-09-22
- Apply: https://job-boards.greenhouse.io/mozilla/jobs/8201924
- Source: https://jobmagic.ai/jobs/contract-staff-software-engineer-firefox-layout-mozilla-fe97jp

## Requirements

- 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.

## Description

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 CADCanada Tier 2 Locations$131,400—$154,600 CAD