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

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., * 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.

• 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)., * 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.

• Purpose is built into our work, with our mission driving every decision
• We challenge assumptions, the status quo, ourselves, and each other
• We are transparent: in our code, our business partnerships, and our everyday interactions
• We seek out people from diverse backgrounds and with perspectives different from our own
• We pair purpose with performance and put people ahead of profit

Our impact is global

• 1000+ paid staff from over 30 countries
• Thousands of volunteer contributors across six continents
• 2 global offices: Berlin and Toronto
• 9 coworking space locations: San Francisco, San Mateo, London, Paris, Portland, Tulsa, Vancouver, Chicago, and Bellevue
• Hundreds of home offices globally

Our benefits are world-class

• Flexible work environment (majority of Mozillians work remotely)
• Industry-leading paid parental leave (up to 26 weeks of fully paid leave for childbearing parents and up to 12 weeks for non-childbearing parents)
• Reimbursement for professional development (up to $3,000/year)
• A work setup including the latest hardware and software of your choice