7 days ago
Remote, United KingdomSenior
Responsibilities
- Design, implement, test, and ship security and hardening features for Firefox enterprise users.
- Advance Firefox security architecture through privilege isolation, trust-boundary improvements, cryptographic protocols, WebPKI, and security-sensitive web APIs.
- Investigate security issues across teams, identify root causes, and deliver robust maintainable fixes.
- Diagnose and resolve browser stability, correctness, performance, and memory issues in a complex multithreaded environment.
Requirements
- At least 3 years of low-level software engineering experience.
- Strong proficiency in C and/or C++ and a solid understanding of security fundamentals.
- Experience debugging cross-platform native applications, including multithreaded, memory, and performance issues.
- Familiarity with HTML, CSS, and JavaScript, plus interest or experience in Rust.
- Ability to work effectively in large, complex, multi-language codebases and collaborate with distributed teams.
- Clear written and verbal technical communication skills.
Benefits
- Performance-based bonus plans for eligible employees.
- Retirement contributions with 100% immediate vesting.
- Quarterly company wellness days, country-specific holidays, and a birthday day off.
- One-time home office stipend and annual professional development budget.
- Quarterly well-being stipend, paid parental leave, employee referral bonus program, and other country-dependent benefits.
- Remote UK position.
Tech Stack
Categories
About Mozilla
Mozilla builds open-source internet software, best known for the Firefox web browser, plus privacy tools like a VPN, password manager, and identity services. Its products are largely free and monetized through search partnerships and paid subscriptions, serving consumers, developers, and enterprises building for the web. Founded in 2005 and headquartered in San Francisco, Mozilla Corporation is wholly owned by the non-profit Mozilla Foundation.