What you'll be doing

• Design, build, and implement security and hardening features for enterprise users to strengthen Firefox’s security posture.
• Advance Firefox’s security architecture across multiple operating systems by building privilege isolation and moving trust boundaries.
• Strengthen Firefox’s security mechanisms including cryptographic protocols, WebPKI, and security-sensitive web APIs.
• Contribute to security initiatives by investigating issues, identifying root causes, and delivering maintainable fixes.
• Improve browser reliability and performance by diagnosing and resolving issues in a multithreaded environment.

Requirements

• 3+ years of experience in low-level software engineering with strong proficiency in C and/or C++.
• Solid understanding of security fundamentals.
• Experience debugging and resolving issues in multithreaded, cross-platform native applications, including memory and performance challenges.
• Familiarity with web technologies such as HTML, CSS, and JavaScript.
• Interest or experience in Rust and ability to work in large, complex, multi-language codebases.
• Effective collaboration and communication skills, with experience working in distributed teams.

Perks and benefits

• Generous performance-based bonus plans for eligible employees.
• Generous retirement contributions with 100% immediate vesting regardless of personal contributions.
• Quarterly all-company wellness days.
• Country-specific holidays plus a day off for your birthday.
• One-time home office stipend.
• Annual professional development budget.
• Quarterly well-being stipend.
• Considerable paid parental leave.
• Employee referral bonus program.
• Additional benefits such as life/AD&D, disability, and employee assistance programs, which vary by country.