Staff Software Engineer, DOM Workers Storage jobs in United States
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Mozilla · 1 month ago

Staff Software Engineer, DOM Workers Storage

positionUnited States
timeFull-time
remoteRemote
seniorityLead/Staff

Mozilla Corporation is a non-profit-backed technology company known for its pioneering web products like Firefox. The role involves optimizing software for web standards and enhancing the reliability of storage initialization impacting millions of users, requiring expertise in multi-threaded C++ code and collaboration across teams.

Browser ExtensionsInternetOpen SourceSoftwareWeb Browsers
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Comp. & Benefits
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H1B Sponsor Likelynote

Responsibilities

Improve Storage, Workers and system-level surfaces of our Web engine, with a strong focus on performance, stability and security
Develop and debug in a large, complex, multi-threaded, and multi-process codebase
Develop and debug across multiple platforms
Investigate issues and propose solutions and architectural improvements
Drive features and projects from start to completion
Read and implement API specifications, and contribute to the standards process
Collaborate with the widespread Firefox team on shared goals

Qualification

C++Multi-threaded programmingCross-platform developmentWeb specificationsProblem-solving skillsWritten communicationLeadership skills

Required

Proficiency in C++
Deep experience with multi-threaded, multi-process codebases, including work on performance-critical, sandboxed or storage architectures
Ability to work with web specifications (like IndexedDB, File System, Web Workers, Service Workers), with the curiosity and adaptability to quickly deepen this expertise
Cross-platform development experience with native applications (desktop and mobile)
Proven ability to deliver maintainable solutions in large, evolving codebases
Strong problem-solving skills, able to diagnose complex issues without clear logs or reliable reproduction steps
Great written communication skills and ability to lead discussions effectively, both in writing and verbally
Commitment to our values: Welcoming differences, Being relationship-minded, Practicing responsible participation, Having grit

Company

Mozilla

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Glassdoor3.6
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Mozilla provides internet solutions and offers firefox, thunderbird, and raindrop.
dateFounded in 1998
location
Mountain View, California, USA
people-size501-1000 employees
web-link
https://www.mozilla.org

H1B Sponsorship

Mozilla has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (2)
2024 (5)
2023 (4)
2022 (3)
2021 (2)
2020 (6)

Funding

Current Stage
Late Stage
Total Funding
$2.3M
Key Investors
AOL
2005-01-01Angel· $0.3M
2003-07-15Series Unknown· $2M

Leadership Team

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John Shaughnessy
Manager, Engineering and Ecosystem Strategy
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Recent News

Mashable
In Memoriam: All the tech that died in 2025
2025-12-31
Digital Trends
Firefox AI kill switch is coming, but you’ll wait until 2026
2025-12-24
TechSpot
Firefox will add an AI "kill switch" after community pushback
2025-12-21
Company data provided by crunchbase