Senior Software Engineer
Location: Remote
Compensation: To Be Discussed
Reviewed: Wed, Oct 14, 2026
This job expires in: 30 days
Job Summary
To enhance Firefox's security features, the remote Senior Software Engineer will design, implement, and test security enhancements while collaborating across teams to address security issues and improve browser performance.
Key responsibilities
- Design, build, and implement security and hardening features for enterprise users
- Advance Firefox's security architecture by improving core security mechanisms
- Diagnose and resolve issues affecting browser reliability, performance, and memory usage
Required qualifications
- 3+ years of systems programming experience with strong proficiency in C and/or C++
- Experience diagnosing and resolving issues in multithreaded, cross-platform native applications
- Familiarity with web technologies (HTML, CSS, JavaScript) and interest in Rust
- Experience working with distributed teams and effectively communicating technical ideas
Complete Job Description
The complete job description is available to members. Premium membership includes:
Full access to 41,283 remote jobs from human-vetted companies, updated daily
Resume Builder - AI-powered tool to craft, enhance, and tailor your resume to a specific job
Twice-monthly live group coaching and the full Remote Career Center
20% member discount on Career Services
Backed by a 30-day money-back guarantee