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Senior Software Engineer - Firefox Enterprise

Remote / Online - Candidates ideally in
Poland, Androscoggin County, Maine, 04274, USA
Listing for: Mozilla
Remote/Work from Home position
Listed on 2025-12-10
Job specializations:
  • Software Development
    Software Engineer, Senior Developer, C++ Developer, Backend Developer
Job Description & How to Apply Below
Location: Poland

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 Firefox team is a community of engineers who care deeply about delivering the fastest, friendliest, most usable browser possible. We are responsible for making the things you see in the browser work securely, quickly, and well! 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 the different operating systems - and helping us grow our user base.

Our team is geographically-distributed, and working in the open is the norm. We contribute to the code driving Firefox on a number of desktop platforms - Windows, Linux, and macOS.

Senior Software Engineer contributes to architectural discussions, and driving feature development within a team. At Mozilla, Senior Engineers are expected to work independently on scoped projects, collaborate closely with peers, and play a key role in delivering high-quality software that aligns with team goals.

What You’ll Get To Do
  • Develop, innovate, and ship the next experience of Firefox through improved integration with the operating system.
  • Improve the 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.
What You Bring
  • 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, ... )
  • You are an excellent communicator and have participated effectively on a distributed team.
  • You’re pragmatic about how to move things forward in specific time frames including trade-offs and safeguards when implementing new functionality.
  • Experience working collaboratively with product managers, project managers, and/or other non-engineering teams.
Bonus Points
  • Professional programming experience in Rust.
  • You have developed cross-platform desktop applications, particularly when this involves some low level systems programming such as Win
    32 APIs on Windows, Cocoa APIs on macOS or GTK on Linux.
  • You have previously successfully contributed to an open source project.

We value a variety of voices within our team and  don t need to check every box on this list to apply.

What you’ll get
  • Generous performance-based bonus plans to all eligible employees - we share in our success as one team
  • Rich medical, dental, and vision coverage
  • Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
  • Quarterly all-company wellness days where everyone takes a pause together
  • Country specific holidays plus a day off for your birthday
  • One-time home office stipend
  • An…
Position Requirements
10+ Years work experience
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