Senior Software Engineer, Firefox Performance

@ Mozilla

About Mozilla and the Role

Mozilla Corporation, a non-profit-backed technology company, has shaped the internet for over 25 years. With pioneering brands like Firefox used by over 225 million people monthly, Mozilla is focused on making the internet better for people. As a part of this mission, the Firefox Performance team builds and refines the core browser technology to ensure optimal speed and performance across platforms such as Windows, Android, Linux, and macOS.

What You’ll Do

• Write code and tests, build prototypes, and fix performance bottlenecks.
• Profile and analyze performance issues within a mature codebase.
• Utilize multiple programming languages with an emphasis on C++.
• Educate and mentor other teams via code reviews, talks, and documentation.
• Collaborate with a distributed team in an open and asynchronous environment.

What You’ll Bring

• 5+ years of software engineering experience with strong C++ proficiency.
• Experience in performance-critical software development.
• Proven capability in diagnosing issues with experimental and measured approaches.
• Strong debugging skills and a system-wide problem solving approach.
• Effective written and verbal communication for a distributed team.

Bonus Points

• Experience with multithreading and concurrency, disk I/O, GPU programming.
• Familiarity with Android or Windows OS application profiling and debugging.

What You’ll Get

• Generous performance-based bonus plans.
• Rich health coverage including medical, dental and vision benefits.
• Generous retirement contributions with immediate vesting.
• Wellness days, professional development budget, and parental leave.
• Additional perks including referral bonuses and home office stipend.

Key Skills/Competency

• C++
• Performance Optimization
• Debugging
• Multithreading
• Profiling
• Distributed Systems
• Open Source
• Asynchronous Communication
• Experimentation
• Cross-Platform Development