[Hiring] Staff Firefox Performance Engineer @Mozilla

Role Description

The Mozilla Firefox Performance team is a community of engineers who care deeply about delivering the fastest browser possible. We are the team responsible for making all parts of the browser go fast.

• Write code and tests, build prototypes, tackle problems, profile and analyze performance bottlenecks
• Learn about a wide variety of problems and solutions across a large, complex, and evolving codebase
• Use several programming languages (e.g., C++, JavaScript, Kotlin, Rust, Python) and techniques to fix performance issues, with an emphasis on C++ and JavaScript
• Help to educate engineers on other teams about writing more performant code through code reviews, giving talks, implementing tooling, and/or writing documentation
• Break down complex performance problems into actionable next steps and drive them to completion
• Partner with engineering teams across the organization to support performance efforts, and lead them within your area
• Contribute to the direction of performance benchmarks and help prioritize the improvements that matter most
• Own the performance of a significant area of the browser end to end, and contribute to the Performance team's technical roadmap
• Work with driven, committed team members to help bring the Open Web to millions of people

Qualifications

• BS/MS in CS or CE, and 5+ years of relevant experience
• Deep proficiency in C++
• Working proficiency in JavaScript
• Proven experience developing performance-critical software
• Experimental and measured approach to solving problems (measurement, and using experiments to diagnose an issue or prove out a solution)
• Proven skill in debugging and analyzing performance bottlenecks, and using profiling tools to diagnose and fix issues (VTune, Xperf, other sampling based profilers)
• Experience with at least one of: multithreading and concurrency, disk I/O, or GPU work
• Track record of driving projects to completion, including work spanning more than one engineer
• Experience collaborating with engineers on other teams to deliver shared goals
• Interest and ability to work in a distributed team (which requires good asynchronous written communication skills as well as good verbal communication skills)

Requirements

• Familiarity with Web Standards or patterns
• Familiarity with Android or Windows OS application programming
• A solid understanding of statistics
• 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)