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Mozilla

Staff Software Engineer, Mozilla VPN

Job Summary

Mozilla VPN is seeking an experienced software engineer to contribute to cross-platform applications including browser extensions and the VPN client for Windows, macOS, Linux, iOS, and Android. The role focuses on developing new features, improving performance, and enhancing reliability, with an emphasis on security and networking protocols. Candidates should have extensive experience in C/C++, cross-platform development, and debugging tools like Wireshark or tcpdump. The position offers opportunities to work on technically complex initiatives within a fully remote, globally distributed team dedicated to shaping a better internet.

Required Skills

Debugging
Software Engineering
Networking Protocols
C/C++
Mentoring
Code Review
Security Best Practices
Cross-platform Development
OS concepts (Windows, macOS)
Wireshark/tcpdump

Benefits

Performance-based bonus
Parental Leave
Paid Holidays
Disability Insurance
Wellness Days
Medical Coverage
Dental Coverage
Vision Coverage
Home Office Stipend
Professional Development Budget
Employee Assistance Program (EAP)
Retirement Contributions
Birthday Leave
Well-being Stipend
Employee Referral Bonus
Life/AD&D Insurance

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, and Pocket, a service for keeping up with the best content online. 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:

Mozilla VPN is seeking an experienced software engineer to join our fully remote, global engineering team. In this role, you will contribute to the suite of products that make up the Mozilla VPN project, including browser extensions, browser integrations, and the Mozilla VPN client—a cross-platform application available on Windows, macOS, Linux, iOS, and Android. You will be responsible for implementing new features as well as improving the performance and the reliability of existing functionality. Additionally, you will have the opportunity to be at the forefront of innovative, challenging, and technically complex initiatives.

What you’ll do:

  • Drive the architecture, development, and optimization of the Mozilla VPN client across platforms (Windows, macOS, Linux, iOS, Android).
  • Work closely with cross functional colleagues, providing technical insight to drive feature development.
  • Maintain high-quality code, enforce security best practices, and mentor engineers by providing comprehensive and insightful code reviews.
  • Triage, debug and resolve software defects

What you’ll bring:

  • 6+ years of software engineering experience
  • Expert level proficiency in C/C++
  • Expertise in networking protocols and privacy and security best practices
Extensive knowledge of core OS concepts of Windows or Mac
  • Experience developing cross-platform applications (Windows, macOS, Linux, iOS, Android)
Experience debugging network related problems with Wireshark, tcpdump, or similar tools
  • Excellent communication skills and experience mentoring engineers

Bonus points:

  • Experience developing cross platform applications with Qt
  • Proficiency in any of the following: Rust, Go, Python, Javascript, TypeScript, Git
  • Open-source contributions to networking or VPN-related projects
  • Experience implementing or improving application observability

What you’ll get:

  • Generous performance-based bonus plans to all regular 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

ReqID: R2759

#LI-REMOTE

Hiring Ranges:

Remote France
€65.000€87.000 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 PostedMay 19th, 2025
Job TypeFull Time
LocationRemote France
Salary€65 - €87
Exciting remote opportunity (requires residency in France) for a Staff Software Engineer, Mozilla VPN at Mozilla. Offering €65 - €87 (full time). Explore more remote jobs on FlexHired!

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