Staff Firefox Performance Engineer

At Mozilla

Posted 27 Oct 2026 · Application link last checked 27 Oct 2026

Applicant Eligibility Open to: 🇺🇸 US
Employment Type Full-time
Compensation Salary not disclosed
Source Mozilla careers site

Apply on the Employer's Site

You'll apply on Mozilla's own careers site. TrueJobs never asks for fees or collects your application.

Apply on Mozilla's Site

Who Can Apply

This role is open to people based in United States — Remote US. If you live somewhere else, you probably can't be hired for it unless the posting says otherwise.

Role Overview

Why Mozilla?

Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people.

The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms.

About this team and role:

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.

This is the start of the employer's description. Read the full job description on Mozilla's site ›

Category

Software & Tech

Before You Apply

Stay Safe When Applying

Never pay money to apply for any job. Legitimate employers don't ask for application fees, training charges, or interviews over Telegram or WhatsApp. Found a closed link or suspicious listing? Report this listing ›