Senior Software Engineer, Firefox Desktop

Mozilla · IT

Apply →
Full Time€45.000 - €60.000 EURPosted Aug 26, 2026

Source: Mozilla

AT A GLANCE
Eligibility
Not available
Category
IT
Salary
€45.000 - €60.000 EUR
Employment
Full Time
Experience
Senior
Posted
Aug 26, 2026

This role’s source listing does not include Hungary as an eligible location.

Mozilla is seeking a Senior Software Engineer for the Firefox Desktop team to focus on OS integration and browser updates, fully remote within Finland.

As a member of the Desktop Integrations team, you will contribute to architectural discussions and lead feature development for Firefox, focusing on installation and update mechanisms on Windows and macOS. The role requires working within a geographically distributed team and driving technical solutions for browser performance and user experience.

Why You’ll Love This Role

Remote Finland
€45.000 - €60.000 EUR salary
Senior level role
Focus on Firefox Desktop internals
Open source contribution opportunity

What You’ll Bring

3-5 Years experience as Software Engineer
Experience with systems-level programming on Windows or macOS
Solid programming skills in C/C++
Effective communication and collaboration skills in distributed teams
Ability to break down technical work and meet project timelines

What You’ll Get

Performance-based bonus plans
Comprehensive medical, dental, and vision coverage
Generous retirement contributions with 100% immediate vesting
Quarterly wellness days
Annual professional development budget
Quarterly well-being stipend

About the Company

Mozilla is a non-profit-backed technology company focused on building the internet as a public resource. They are best known for the Firefox web browser and prioritize open-source collaboration and privacy-minded software development.

Listing checked for remote eligibility · Posted Aug 26, 2026 · MozillaApply →
Apply →