Senior Software Engineer, OS Integration

• Join Mozilla as a Senior Software Engineer, OS Integration, working fully remotely from the UK. • Help Firefox work well with Windows, macOS and Linux as part of a distributed OS Integration team. • Develop fixes, improvements and new features for Firefox, often with a cross-platform component. • Maintain and develop the Firefox installer and updater. • Improve the browsing experience for hundreds of millions of Firefox users. • Work on open-source software for a non-profit-backed company with a mission to make the internet better for people.

• Bring 5+ years of overall software engineering experience. • Show strong knowledge of C and C++. • Use C++ to build desktop applications on Windows, macOS or Linux. • Know web technologies such as JavaScript and HTML. • Apply secure coding practices and understand memory safety concerns. • Show strong problem-solving and debugging skills. • Communicate clearly in writing and speech with a collaborative mindset. • Work effectively in a distributed team and share Mozilla's values.

• Have experience developing installers or updaters on any operating system. • Know Windows internals such as the BITS server or MSIX packages. • Contribute to open-source projects or build personal engineering projects.

• Improve the quality of Firefox and other Mozilla products by debugging and fixing software defects. • Contribute to new features and improvements. • Break down tasks and work with others to deliver solutions. • Collaborate with experienced software engineers. • Perform code reviews and provide technical direction. • Work with a geographically distributed development team. • Interact with teams throughout the organisation.

• Earn £66,000–£87,000 a year, plus a generous performance-based bonus for eligible employees. • Work fully remotely from the UK with a one-time home office stipend. • Enjoy considerable paid parental leave. • Take quarterly all-company wellness days, country-specific holidays and a day off for your birthday. • Receive rich medical, dental and vision coverage, with other benefits varying by country. • Get generous retirement contributions with 100% immediate vesting. • Use an annual professional development budget. • Benefit from an employee referral bonus programme.

Mozilla Corporation is the non-profit-backed technology company behind Firefox, the privacy-minded web browser used by more than 225 million people each month. It is wholly owned by the non-profit Mozilla Foundation, so it answers to its mission rather than to shareholders. Mozilla builds open-source software with thousands of volunteer contributors, with work spanning AI, social media, security and more.