58K–77K EUR / year
Senior Software Engineer, OS Integration
OtherRemote — Spain
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 work on Firefox’s installer and updater, as well as debugging defects and improving product quality for users worldwide.
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 responsible for Firefox’s integration with Windows, macOS, and Linux-based operating systems.
Stack
CC++JavaScriptHTMLWindowsmacOSLinux
What you'll do
- Debug and fix software defects in Firefox and other Mozilla products
- Develop new features and improvements, including installer and updater work
- 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++
- Experience developing desktop applications in C++ for Windows, macOS, or Linux
- Knowledge of JavaScript and HTML
- Knowledge of secure coding practices and memory safety
- Strong problem-solving, debugging, communication, and collaboration skills
Nice to have
- Experience developing installers or updaters
- Knowledge of 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
- Home office stipend
- Professional development budget
- Paid parental leave