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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 architecture, the remote Senior Software Engineer will design, implement, and test security features while collaborating with cross-functional teams to address security issues and improve browser performance.

Key responsibilities
  • Design, build, and implement security and hardening features for enterprise users
  • Contribute to advancements in Firefox's security architecture across multiple operating systems
  • 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
  • Experience working with distributed teams and effectively communicating technical ideas

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