66K–87K GBP / year
Senior Software Engineer, OS Integration
OtherRemote — UK
Published on 2026-11-11
These details were extracted automatically from the original listing. They may not be complete or fully up to date — it's worth checking the original job post.
About this role
Develop and maintain Firefox features and fixes that integrate with Windows, macOS, and Linux. The role includes maintaining and developing Firefox’s installer and updater, debugging defects, and improving the browsing experience for users.
About the company
Mozilla builds open-source products and technologies, including Firefox, that prioritize privacy, security, and an open internet.
The team
Mozilla’s OS Integration team, a distributed team working across Windows, macOS, and Linux.
Stack
CC++JavaScriptHTMLWindowsmacOSLinux
What you'll do
- Debug and fix software defects in Firefox and other Mozilla products
- Contribute to new features and improvements
- Maintain and develop the Firefox installer and updater
- Break down tasks and collaborate with distributed teams
- Review code and provide technical direction
What we're looking for
- 5+ years of software engineering experience
- Strong knowledge of C and C++
- Desktop application development experience with C++ on Windows, macOS, or Linux
- Knowledge of JavaScript and HTML
- Knowledge of secure coding practices and memory safety
- Strong problem-solving, debugging, and communication skills
- Ability to work effectively in a distributed team
Nice to have
- Installer or updater development experience
- Experience with Windows internals, BITS, or MSIX packages
- Open-source contributions or personal engineering projects
Benefits
- Performance-based bonus plan
- Medical, dental, and vision coverage
- Retirement contributions with immediate vesting
- Quarterly company wellness days
- Country-specific holidays and a birthday day off
- One-time home office stipend
- Annual professional development budget
- Paid parental leave