Contract Senior Software Engineer – WebGPU, Firefox, Gecko, Rust

Mozilla

. Fix prioritized correctness and validation bugs from the wgpu "WebGPU for Firefox" project, plus security and fuzzer-reported bugs .

Posted 9/21/2026contractRemote • United States, CanadaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates strong expertise in Rust programming and debugging within large systems and graphics codebases, with a focus on contributing to open-source projects like wgpu. Proficient in WebGPU, Vulkan, and security practices related to graphics applications.

Highest-signal resume keywords

Strong RustWebGPU ExperienceDebugging SkillsVulkan ExperienceContributions to wgpu

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

RustDebuggingWebGPUVulkanDirectXHLSLMSLSPIR-VWGSLLow-Level Android Graphics

Soft Skills

CollaborationTask Coordination

Tools & Technologies

GeckoFuzzerWeb Security Model

Industry Keywords

Open-SourceGraphics CodebaseApplication BlockersConformance Test SuiteSecurity Experience

Tech Stack

Tools & technologies

AndroidLinuxRust

About the role

Key responsibilities & impact

Fix prioritized correctness and validation bugs from the wgpu "WebGPU for Firefox" project, plus security and fuzzer-reported bugs
Diagnose and fix application blockers, real apps, and demos that do not yet work in Firefox Nightly
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 fixes upstream
Coordinate with the Firefox WebGPU team on task selection and priority
Deliver reviewed fixes landed upstream in wgpu and Gecko with tests, reducing the P2/P3 backlog, app blockers, and CTS failures for WebGPU on Linux and Android

Requirements

What you’ll need

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) — preferred
WebGPU / graphics / GPU experience — preferred
Experience with Vulkan, DirectX/D3D 11/12, Metal — preferred
Experience with WGSL, HLSL, MSL, SPIR-V — preferred
Low-level Android graphics experience — preferred
Security or fuzzing experience and Web security model knowledge — preferred