What you'll be doing

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

Requirements

3+ years of systems programming experience with strong proficiency in C and/or C++ and a solid understanding of security fundamentals.
Experience diagnosing and resolving issues in multithreaded, cross-platform native applications, including memory and performance challenges.
Familiarity with web technologies (HTML, CSS, JavaScript) and interest or experience in Rust.
Ability to work effectively within large, complex, multi-language codebases.
Experience collaborating with distributed teams and communicating technical ideas clearly in writing and conversation.

Generous performance-based bonus plans for eligible employees.
Generous retirement contributions with 100% immediate vesting regardless of employee 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 including life/AD&D, disability, EAP, varying by country.