Senior Software Engineer - Sync Team

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Why Mozilla?

Mozilla Corporation is a non-profit-backed technology company dedicated to shaping a better internet. We are the creators of pioneering brands like Firefox, the privacy-minded web browser, and Pocket, a service for discovering and saving content. With over 225 million monthly users, we are focused on the next 25 years of technology, reclaiming an internet built for people, not companies. Our work spans diverse areas including AI, social media, and security, all while staying true to our core mission of improving the internet for everyone.

As a wholly owned subsidiary of the non-profit 501(c) Mozilla Foundation, Mozilla Corporation is mission-driven, not shareholder-driven. We collaborate with thousands of global volunteers to design, build, and distribute open-source software, empowering people to experience the internet on their own terms.

About This Team and Role

The Sync team is seeking a motivated Senior Software Engineer who thrives on curiosity, continuous learning, and collaborative, open-source development. If you're already familiar with why Rust is a highly-loved programming language, or are eager to learn and embrace it, we invite you to join Mozilla. You will contribute to our small, distributed team, enhancing the connected Firefox experience for our global user base.

What You'll Do

• Provide Firefox users with a seamless experience to access and control their personal and browsing data (history, bookmarks, logins, etc.) across all their devices.
• Contribute to the evolution of the Application-Services library, the core of our sync and storage features, and support its implementation across all Firefox platforms.
• Expand your knowledge of the Firefox browser to support Sync and Send/Close tab functionality across devices.
• Collaborate with engineers both within and outside the Sync team to deliver features that enhance the utility and user agency of Firefox.
• Provide constructive feedback, timely reviews, and well-documented ideas to improve team practices and skills.

What You'll Bring

• Experience and enjoyment in using low-level languages such as C++, Golang, or Rust to solve complex problems.
• Strong knowledge of web or native application development using JavaScript, Kotlin, or Swift, with a track record of shipping complex applications at scale.
• Proven ability to work independently, coordinating with colleagues to understand the business value, operational impact, and security implications of your changes.
• Excellent communication skills, demonstrated through sharing learnings via documentation and demos to increase impact.

What Will Make This Even Better

• Comfort working collaboratively with a remote and globally distributed team, often iterating on ideas asynchronously.
• A desire to ship work that positively impacts user experience and team objectives.
• Natural curiosity and a willingness to tackle complex tasks outside your existing knowledge domain, with the confidence to seek help when needed.
• Experience working with multi-functional teams on desktop or mobile applications.

What You'll Get

• Generous performance-based bonus plans for all eligible employees.
• Comprehensive medical, dental, and vision coverage.
• Generous retirement contributions with 100% immediate vesting.
• Quarterly company-wide wellness days for collective pause and rejuvenation.
• Country-specific holidays plus a birthday day off.
• A one-time home office stipend.
• Annual professional development opportunities.