Senior Performance Engineer – Browser Speed & Systems

Mozilla; United States; Remote; USD 150,000 - 210,000; Full time

Job summary

The Mozilla Corporation is the non-profit-backed tech company behind Firefox, focused on delivering a blazing-fast browser across Windows, Android, Linux, and macOS. You will work on the Performance team, tackling bottlenecks and shaping how fast the Open Web runs for millions of users.

Join a distributed, open environment that values curiosity, system-wide thinking, and teaching others how to write efficient code in C++, JavaScript, and beyond.

Qualifications

• BS/MS in CS or CE with 7+ years of relevant experience.
• Strong proficiency in C++ and JavaScript.
• Experience with multiple languages (Kotlin, Rust, Python) welcome.

Responsibilities

• Write code and tests to improve browser performance across platforms.
• Profile, analyze, and fix performance bottlenecks in the codebase.
• Collaborate with teams to educate on writing faster, reliable code.
• Define next steps from high level objectives and drive performance efforts.

Skills

C++ programming

JavaScript

Kotlin

Rust

Python

Education

BS/MS in CS or CE

Job description

The Mozilla Corporation is the non-profit-backed tech company behind Firefox, focused on delivering a blazing-fast browser across Windows, Android, Linux, and macOS. You will work on the Performance team, tackling bottlenecks and shaping how fast the Open Web runs for millions of users.

Join a distributed, open environment that values curiosity, system-wide thinking, and teaching others how to write efficient code in C++, JavaScript, and beyond.