---
title: "Contract Staff Software Engineer-FireFox Layout"
company: "Mozilla"
company_url: "https://www.remjobs.works/companies/mozilla"
url: "https://www.remjobs.works/job/mozilla-contract-staff-software-engineer-firefox-layout-507a10ce-5efa-4be0-847a-be63b4c6cc56"
apply_url: "https://job-boards.greenhouse.io/mozilla/jobs/8201924"
workplace: remote
location: "Remote Canada"
remote_scope: "Canada"
employment_type: unspecified
seniority: staff
role: software-engineering
region: canada
skills: ["cpp", "javascript", "linux", "rust"]
date_posted: 2026-09-22T14:00:53.000Z
first_seen_by_remjobs: 2026-09-22T14:03:51.367Z
---

# Contract Staff Software Engineer-FireFox Layout

**Mozilla** · Remote Canada

Apply: https://job-boards.greenhouse.io/mozilla/jobs/8201924

## About Mozilla

Mozilla is the not-for-profit behind the lightning fast Firefox browser. We put people over profit to give everyone more power online.

## About the role

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

---

Source: Mozilla's own career page, read by RemJobs. Canonical HTML version: https://www.remjobs.works/job/mozilla-contract-staff-software-engineer-firefox-layout-507a10ce-5efa-4be0-847a-be63b4c6cc56