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Mozilla

Staff Software Engineer, Desktop Integration

Job Summary

The role involves developing and improving Firefox features related to OS integration, updates, and security for desktop platforms including Windows, macOS, and Linux. Candidates should have experience in systems programming, with proficiency in C/C++ and preferably Rust, and hands-on development on major desktop OS APIs. The engineer will also collaborate with a distributed team, troubleshoot software defects, and contribute to open source projects. The position focuses on enhancing user experience and security for large-scale deployments while working within a mission-driven, inclusive environment.

Required Skills

Debugging
Rust
C/C++
Systems Programming
Software Development Lifecycle
Cross-platform Development
Open Source Contribution
Windows API
Desktop Platforms
Operating System Integration
Low-Level API Coding
Cocoa API

Benefits

Health Insurance
Performance-based bonus
Paid Parental Leave
Life Insurance
Disability Insurance
Employee Assistance Program
Wellness Days
Dental Coverage
Vision Coverage
Home Office Stipend
Professional Development Budget
Employee Referral Program
Retirement Contributions
Country Holidays
Birthday Leave

Job Description

To learn the Hiring Ranges for this position, please select your location from the Apply Now dropdown menu.

To learn more about our Hiring Range System, please click this link.

Why Mozilla?

Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people.

The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms.

About this team and role:

The Firefox team is a community of engineers who care deeply about delivering the fastest, friendliest, most usable browser possible. We are responsible for making the things you see in the browser work securely, quickly, and well! The desktop team is a multi-functional team that focuses on updates, installs and integrating Firefox with different OS platforms. As part of the team, you will be responsible for all things related to OS integration and helping us grow our user base.

Our team is geographically-distributed, and working in the open is the norm. We contribute to the code driving Firefox on a number of desktop platforms - Windows, Linux, and macOS.

What is a Staff Software Engineer?

A Staff Software Engineer is the next level up from a Senior Software Engineer. At Mozilla this role can vary, but typically a staff engineer supports an engineering team, providing technical leadership, building cross-team relationships, and helping the team deliver on their objectives.

What you’ll do:

  • Develop, innovate, and ship the next experience of Firefox features through installs, updates, and improved OS integrations.
  • Improve the ease of use and security of Firefox in large deployments by developing better administration tools.
  • Assess what work supports the team and product roadmap and make insightful recommendations in regards to priorities.
  • Work with expert software engineers to further develop your understanding of the Windows, macOS and Linux platforms.
  • Optimize the quality of Firefox by hunting down and fixing software defects, improving the experience of hundreds of millions of users.
  • Work with a geographically-distributed development team.

What you’ll bring:

  • Experience with systems programming on a major desktop platform (Windows, macOS or Linux).
  • Development experience on Windows and/or macOS, particularly with low-level Win32/Cocoa API coding.
  • A solid understanding of C/C++ and some knowledge of Rust.
  • You are an excellent communicator and have participated effectively on a distributed team.
  • You’re pragmatic about how to move things forward in specific timeframes including trade-offs and safeguards when implementing new functionality.
  • Experience working collaboratively with product managers, project managers, and/or other non-engineering teams.

Bonus Points

  • Professional programming experience in Rust.
  • You have developed cross-platform desktop applications, particularly when this involves low level systems programming.
  • You have previously successfully contributed to an open source project.

We value a variety of voices within our team and at Mozilla. You don't need to check every box on this list to apply.

What you’ll get:

  • Generous performance-based bonus plans to all eligible employees - we share in our success as one team
  • Rich medical, dental, and vision coverage
  • Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
  • Quarterly all-company wellness days where everyone takes a pause together
  • Country specific holidays plus a day off for your birthday
  • One-time home office stipend
  • Annual professional development budget
  • Quarterly well-being stipend
  • Considerable paid parental leave
  • Employee referral bonus program
  • Other benefits (life/AD&D, disability, EAP, etc. - varies by country)

About Mozilla

Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online.

Commitment to diversity, equity, inclusion, and belonging

Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities, and expressions.

We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at [email protected] to request accommodation.

We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose.

Group: C

#LI-DNI

Req ID: R2837

Hiring Ranges:

Remote Germany
€80.000€117.000 EUR

Interested in this job?

Application deadline: Open until filled

Logo of Mozilla

Mozilla

Mozilla is the not-for-profit behind the lightning fast Firefox browser. We put people over profit to give everyone more power online.

See more jobs
Date PostedJuly 11th, 2025
Job TypeFull Time
LocationRemote Germany
Salary€80 - €117
Exciting remote opportunity (requires residency in Germany) for a Staff Software Engineer, Desktop Integration at Mozilla. Offering €80 - €117 (full time). Explore more remote jobs on FlexHired!

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