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.

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.