Senior Software Engineer - Firefox Enterprise

Mozilla Corporation is the non‑profit‑backed technology company that has shaped the internet for the better over the last 25 years. We create pioneering brands like Firefox, the privacy‑minded web browser, and now welcome more than 225 million people each month to use our products. We focus on diverse areas—including AI, social media, security and more—while staying true to our mission to make the internet better for people.

The Firefox team is a community of engineers who care deeply about delivering the fastest, friendliest, most usable browser possible. The Enterprise team is a cross‑disciplinary team in charge of improving and maintaining Firefox support for large enterprise deployments. As part of the team, you will be responsible for all things related to OS integration—such as updates, installs, and integrating Firefox with different operating systems—and helping us grow our user base. Our team is geographically distributed and works in the open, contributing to the code that drives Firefox on Windows, Linux, and macOS.

• Develop, innovate, and ship the next experience of Firefox through improved integration with the operating system.
• Improve ease of use and security of Firefox in large deployments by developing better administration and monitoring tools.
• Improve Firefox functionality by better integration with remote services.
• Assess what work supports the team and product roadmap and make insightful recommendations in regards to priorities.
• Optimize the quality of Firefox by hunting down and fixing software defects, improving the experience of hundreds of millions of users.
• Work with a geographically‑distributed development team.

• Experience with systems programming on a major desktop platform (Windows, macOS, or Linux).
• A solid understanding of C/C++ and some knowledge of Rust.
• A solid understanding of JavaScript and typical interactions with the backend (services, REST, …).
• Excellent communicator and participation in distributed team environments.
• Pragmatic about moving things forward within specific timeframes, including trade‑offs and safeguards when implementing new functionality.
• Experience working collaboratively with product managers, project managers, and other non‑engineering teams.

• Professional programming experience in Rust.
• Experience developing cross‑platform desktop applications involving low‑level systems programming such as Win32 APIs on Windows, Cocoa APIs on macOS, or GTK on Linux.
• Previous successful contribution to an open source project.

• Generous performance‑based bonus plans to all eligible employees.
• Rich medical, dental, and vision coverage.
• Generous retirement contributions with 100 % immediate vesting.
• Quarterly all‑company wellness days.
• 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).

Mozilla exists to build the Internet as a public resource accessible to all because we believe open and free is better than closed and controlled. When you work at Mozilla, you have a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online.

Mozilla encourages applications from all equity‑seeking communities and will provide reasonable accommodations to qualified individuals with disabilities. We are an equal‑opportunity employer. We do not discriminate on the basis of race, religion, gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior.

Hiring Ranges Remote UK£65,000—£95,000 GBP