Senior Staff Performance Engineer, Firefox

Mozilla

16h•CA$149,000 - CA$220,000•Remote

About The Position

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. Our team is geographically-distributed, and working in the open is the norm. We contribute to the code driving the Firefox browser on a number of platforms - Windows, Android, Linux, and macOS. Our focus is on finding and fixing things that slow down the browser as well as helping other teams write fast and reliable code to make Firefox excellent for users.

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
Take an 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 multithreading and concurrency, disk I/O, GPU
Proven track record of setting team goals and driving them to completion.
Experience motivating and aligning cross-functional teams to deliver on shared goals.
An interest and ability to work in a distributed team (which requires good asynchronous written communication skills as well as good verbal communication skills)

Nice To Haves

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

Responsibilities

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
Independently define and drive actionable next steps from high level objectives
Work with engineering teams across the organization to assist and lead performance efforts
Shape the future of performance benchmarks, and set the proper priorities for the necessary improvements
Develop strategies for the future of the Performance team and the Organization as a whole
Work with driven, committed team members to help bring the Open Web to millions of people

Benefits

Generous performance-based bonus plans to all eligible employees
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)