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

Remote

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.

Benefits & Perks

Health & Wellness

Health Insurance

100% premium coverage for employee, spouse & dependents

Dental Insurance

100% premium coverage

Vision Insurance

100% premium coverage

Mental Health Benefits

Therapy and coaching sessions included

Disability Insurance

Short and Long Term Disability insurance

Life Insurance

Life/AD&D insurance provided

Health Savings Account (HSA)

Mozilla offers a health savings account option.

Flexible Spending Account (FSA)

Mozilla offers a flexible spending account for pre-tax healthcare costs.

Employee Assistance Program

Mozilla provides an employee assistance program for confidential counselling and support.

Fitness Stipend

Gym/wellness reimbursement

Wellness Programs

Quarterly wellbeing stipend

Gender Affirming Care

Gender affirming care covered under health benefits

Financial

401(k) / Retirement Plan

Automatic employer contribution, 100% immediate vesting

Performance Bonus

Performance-based bonus plans for regular employees

Relocation Assistance

Mozilla offers relocation support for employees who move for a role.

Commuter Benefits

Pre-tax commuter benefits

Time Off

PTO / Vacation

Accrues immediately from day one

Sick Days

Accrues immediately from day one

Paid Holidays

12 country-specific holidays annually (US)

Company Shutdown Days

Quarterly company-wide wellness pause days

Remote & Equipment

Home Office Stipend

A one-time home office stipend plus a budget for office essentials to make working remotely ergonomically comfortable.

Internet Stipend

Monthly internet reimbursement for remote workers

Coworking Allowance

Reimbursement for coworking space

Company Offsites / Retreats

Regular All Hands company-wide gatherings

Family & Care

Parental Leave

Childbearing parents receive 26 weeks of paid leave, and non-childbearing parents in the US receive 12 weeks.

Professional Growth

Learning & Development Budget

Annual professional development budget up to $3,000/year

Conference Attendance

Covered under annual professional development budget

Certification Support

Covered under annual professional development budget

Mentorship Program

Commitment to mentorship for employee growth

Culture & Perks

Employee Referral Bonus

Mozilla pays employee referral bonuses.

Employee Resource Groups

7 Mozilla Resource Groups including Afrozilla, Pridezilla, WoMoz, and more

Team Events & Social Budget

Company-wide All Hands gatherings and team activities

Free Snacks & Drinks

Complimentary snacks and beverages in office

Job Description

The role

Responsibilities

Scope and references

Definition of done

Required qualifications

Preferred

Benefits & Perks

Health & Wellness

Financial

Time Off

Remote & Equipment

Family & Care

Professional Growth

Culture & Perks

Tech Stack

JavaScript & Libraries

Frameworks

Infrastructure

CMS & Content

Hosting

CDN & Delivery

Analytics & Monitoring

Payments

Integrations

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