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Firefox Performance Engineer
Job in
New York, New York County, New York, 10261, USA
Listed on 2026-10-18
Listing for:
Mozilla
Full Time
position Listed on 2026-10-18
Job specializations:
-
Software Development
Software Engineer, Java Developer
Job Description & How to Apply Below
Location: New York
- 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
- Do you value curiosity and enjoy finding a needle in a haystack? Do you approach problems by looking at the system as a whole? Do you want to help lead and shape the future of the Internet? Do you like making things blazingly fast? If so, we’d love to hear from you
- 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 Java Script
- 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
- Health and wellness:
Mozilla covers medical, dental and vision plan premiums at 100% for U.S. and Canadian employees. Our offerings give you the options you need to manage your health — and your family’s — the way you want. - Mental health:
Mental health is as important as our physical health. That’s why Mozilla’s health benefits include therapy and coaching sessions to make sure our people have access to the care they need. - Time away:
With all of life’s demands, time away from work to disconnect and recharge is essential. In addition to country-specific holidays (12 in the U.S. and Canada), vacation and sick time start accruing right away (specifics vary by country). Everyone also takes a pause together on quarterly all-company wellness days, plus you get to celebrate the most personal holiday of all: your birthday. - Parental leave:
While Mozilla’s parental leave policies vary globally, our U.S. and Canadian-based employees can look forward to 26 weeks of paid leave for childbearing parents and 12 weeks of paid leave for non-childbearing parents. - Financial:
Mozilla is a private company, so our compensation isn’t tied to stock options or equity plans. Instead, we offer generous, performance-based bonus plans to all regular employees to underscore that we share in our success as one team. As for retirement savings for US and Canadian employees, Mozilla contributes a percentage of your eligible base salary each year to the 401(k) Plan/RRSP (regardless of whether you contribute or not), with 100% vesting. - Learning and development:
We’re big believers in learning by doing, and we also want to invest in your education and development beyond your role. Every employee is eligible for an annual professional development budget. Mozillians can put it toward technical or management training, certifications, conferences and more. - Help when you need…
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