Skip to content
ITA Jobs
All vacancies
Mozilla logo

Senior Software Engineer, Firefox Security

Mozilla

Remote · SwedenSalary not disclosedfull-timeMozilla Careers

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years.

Responsibilities

  • Design, build and implement security and hardening features for enterprise users
  • Design, implement, test, and ship cutting-edge security features that strengthen Firefox’s security posture.
  • Advance Firefox’s security architecture across multiple operating systems
  • Contribute to and drive cutting-edge improvements to Firefox’s core security posture, by building privilege isolation and moving trust boundaries or Strengthen Firefox’s security architecture: Improve Firefox’s core security mechanisms including cryptographic protocols, WebPKI, and security-sensitive web APIs.
  • Contribute to our security initiatives: Work across teams to investigate security issues, identify root causes, and deliver robust, maintainable fixes.
  • Improve browser reliability and performance: Diagnose and resolve issues affecting stability, correctness, performance, and memory usage in a complex, multithreaded environment.

Languages

    Work format
    Remote
    Seniority
    Senior
    Posted
    15 Oct 2026
    Last verified
    In the last 5 days

    Similar roles

    Keep looking