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Senior Performance Engineer

Location: Remote
Compensation: To Be Discussed
Reviewed: Tue, Sep 22, 2026
This job expires in: 30 days

Job Summary

To support the Firefox Performance team, the remote Senior Performance Engineer will write code, analyze performance bottlenecks, and educate engineers on developing performant software while leveraging a variety of programming languages, primarily C++ and JavaScript.

Key responsibilities
  • Write code and tests, build prototypes, and profile performance issues across various platforms
  • Educate cross-functional teams on performance best practices through code reviews and documentation
  • Define and drive actionable steps to improve performance benchmarks and strategies for the team
Required qualifications
  • BS/MS in Computer Science or Computer Engineering with 7+ years of relevant experience
  • Mastery of programming in C++ and familiarity with JavaScript
  • Proven experience in developing performance-critical software and debugging performance bottlenecks
  • Experience with multithreading, concurrency, and profiling tools like VTune or Xperf
  • Demonstrated ability to set team goals and align cross-functional teams to achieve them

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