Senior Staff Performance Engineer
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Job Description
Senior Staff Performance Engineer optimizing Mozilla’s Firefox browser. Profiling bottlenecks, improving benchmarks, and guiding performance engineering across a distributed team.
Responsibilities:
- Write code and tests, build prototypes, tackle problems, and profile and analyze performance bottlenecks
- Learn about problems and solutions across a large, complex, evolving codebase
- Use C++, JavaScript, Kotlin, Rust, and Python to fix performance issues, emphasizing C++ and JavaScript
- Educate engineers on other teams about performant code through code reviews, talks, tooling, and documentation
- Independently define and drive actionable next steps from high-level objectives
- Work with engineering teams across the organization to assist with and lead performance efforts
- Shape future performance benchmarks and set priorities for necessary improvements
- Develop strategies for the future of the Performance team and organization
- Collaborate with committed team members to help bring the Open Web to millions of people
Requirements:
- BS/MS in CS, CE and 7+ years relevant experience
- A mastered understanding of programming in C++
- An understanding of programming in JavaScript
- Proven experience developing performance critical software
- Experimental and measured approach to solving problems, including measurement and experiments
- Proven skill in debugging and analyzing performance bottlenecks and using profiling tools such as VTune and Xperf
- Experience with multithreading and concurrency, disk I/O, and GPU
- Proven track record of setting team goals and driving them to completion
- Experience motivating and aligning cross-functional teams to deliver shared goals
- Ability and interest in working in a distributed team, with strong asynchronous written and verbal communication skills
- Bonus: Familiarity with Web Standards or patterns
- Bonus: Familiarity with Android or Windows OS application programming
- Bonus: Solid understanding of statistics
- Bonus: Prior experience working on a modern web browser
Benefits:
- Generous performance-based bonus plans to all eligible employees - we share in our success as one team
- Rich medical, dental, and vision coverage
- Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
- Quarterly all-company wellness days where everyone takes a pause together
- Country specific holidays plus a day off for your birthday
- One-time home office stipend
- Annual professional development budget
- Quarterly well-being stipend
- Considerable paid parental leave
- Employee referral bonus program
- Other benefits (life/AD&D, disability, EAP, etc. - varies by country)
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