Remote Jobs Sign In

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 full-time Senior Software Engineer will design, implement, and test security enhancements for enterprise users while working remotely from the Netherlands.

Key responsibilities
  • Design, build, and implement security and hardening features for enterprise users
  • Advance Firefox's security architecture across multiple operating systems by improving core security mechanisms
  • Investigate security issues and deliver robust, maintainable fixes while improving browser reliability and performance
Required qualifications
  • 3+ years of experience in low-level software engineering 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 or experience in Rust
  • Ability to work effectively within large, complex, multi-language codebases
  • Experience collaborating with distributed teams and communicating technical ideas clearly

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