Contract Senior Software Engineer - WebGPU-Firefox/Gecko (Rust)

Mozilla

New Contractual 🇨🇦 Canada only Remote

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AI Job Summary

Fix correctness, security, and validation bugs in wgpu, Firefox's WebGPU implementation, to enable shipping on Linux and Android. Work through prioritized issues, land fixes upstream in the open-source wgpu project and Gecko, diagnose application blockers, and reduce WebGPU conformance test failures. Requires strong Rust, experience in large systems or graphics codebases, and comfort with open-source development and debugging. Prior wgpu contributions and graphics API experience preferred.

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Job Description

The role

You will help the Firefox WebGPU team clear its backlog of correctness and security bugs in wgpu, Firefox’s WebGPU implementation, so WebGPU can ship on Linux and Android. You will take on well-defined, prioritized issues, land fixes upstream in the open-source wgpu project and in Gecko, and free the core team to focus on the remaining release-blocking work.

Responsibilities

Fix prioritized correctness and validation bugs from the wgpu "WebGPU for Firefox" project (the “Current”, “CTS Burndown”, “Linux release” and “Android release” columns), plus security and fuzzer-reported bugs.
Diagnose and fix application blockers, real apps and demos that do not yet work in Firefox Nightly (the webgpu-apps meta-bug).
Work through WebGPU conformance test suite (CTS) failures.
Write and pass tests, work through code review with wgpu maintainers and Gecko module owners, and land upstream.
Coordinate with the Firefox WebGPU team on task selection and priority.

Scope and references

wgpu "WebGPU for Firefox" GitHub project
webgpu-apps meta-bug (Bugzilla) blockers
WebGPU conformance test suite (CTS) expected-failure lists
Specific issue lists to be provided by the WebGPU team

Definition of done

Reviewed fixes landed upstream in wgpu and in Gecko, with tests, measurably reducing the P2/P3 backlog, app blockers, and CTS failures, contributing to WebGPU riding the trains on Linux and Android.

Required qualifications

Strong Rust.
Experience in a large systems or graphics codebase, and the ability to ramp on wgpu quickly.
Comfort working upstream in an open-source project (public issues and code review).
Solid debugging skills (validation bugs, corner cases, fuzz findings).

Preferred

Prior contributions to wgpu (the team can onboard an existing wgpu contributor fastest).
WebGPU / graphics / GPU experience. Modern graphics APIs: Vulkan, DirectX/D3D 11/12, Metal. Shader languages: WGSL, HLSL, MSL, SPIR-V.
Low-level Android graphics experience
Security or fuzzing experience. Web security model.

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Role Contract Senior Software Engineer - WebGPU-Firefox/Gecko (Rust)
Experience 5-7 years
Work type Remote
Location Canada

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Mozilla

Consumer Apps & Media · United States

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more.

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Job Overview

Eligibility

Canada Hires remotely in Canada.

Workplace

Remote

Job Posted:

2 days ago

Job Type

Contractual

Experience

5-7 years