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- Tasks: Join our global team to develop and optimise the Mozilla VPN client across multiple platforms.
- Company: Mozilla Corporation is a non-profit-backed tech company dedicated to improving the internet for everyone.
- Benefits: Enjoy remote work, generous bonuses, wellness days, and a professional development budget.
- Why this job: Be part of innovative projects that prioritise privacy and security while shaping the future of technology.
- Qualifications: 6+ years in software engineering with expertise in C++, Javascript, and cross-platform development.
- Other info: Work remotely from various countries and enjoy a supportive, mission-driven culture.
The predicted salary is between 48000 - 84000 £ per year.
Social network you want to login/join with:
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Client:
Location:
London, United Kingdom
Job Category:
Other
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EU work permit required:
Yes
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Job Reference:
524a3c63e57d
Job Views:
2
Posted:
29.06.2025
Expiry Date:
13.08.2025
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Job Description:
Senior Software Engineer, Mozilla VPN
at Mozilla Corporation Team: Privacy Services Locations: Remote Germany, Remote France, Remote Finland, Remote Poland, Remote New Zealand, Remote Sweden, Remote Netherlands, Remote Denmark, Remote Canada, Remote Belgium, Remote Australia, Remote US, Remote UK, Remote Spain
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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:
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 is a Senior Software Engineer at Mozilla?
A Senior Software Engineer is the next level from a Software Engineer. At Mozilla, this role can vary, but is typically someone who is largely self directed after work is assigned and is advanced in their domain. They help team members get information they need to be successful while also being the go-to person for peer reviews in their domain. They have a solid understanding of the product strategy and can recommend solutions to critical issues when needed, assist junior engineers in risk management and escalation, and advocate for and implement changes that affect their team. A Senior Software Engineer actively seeks opinions and ideas from their team members, including those with varied experiences and perspectives to improve more collective results.
What you’ll do:
- Contribute to the development and optimization of the Mozilla VPN client across platforms (Windows, macOS, Linux, iOS, Android).
- Contribute to the Mozilla VPN extension for Firefox.
- Own features and collaborate cross functionally to bring them from ideation to end-users.
- Write pragmatic, maintainable, efficient code and review the code of your peers.
- Triage, debug and resolve software defects
What you’ll bring:
- 6+ years of software engineering experience
- High level of proficiency in C++, Javascript, and full-stack web development.
- Experience developing cross-platform applications (Windows, macOS, Linux, iOS, Android)
- An understanding of privacy and security principles and best-practices
- Excellent communication skills and experience mentoring engineers
Bonus points:
- Experience developing cross platform applications with Qt
- Proficiency in any of the following: Rust, Go, Javascript, TypeScript, Lit
- 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)
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Senior Software Engineer, Mozilla VPN (London) employer: Mozilla
Contact Detail:
Mozilla Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Software Engineer, Mozilla VPN (London)
✨Tip Number 1
Familiarise yourself with Mozilla's mission and values. Understanding their commitment to privacy and open-source software will help you align your answers during interviews and demonstrate your passion for their work.
✨Tip Number 2
Showcase your experience with cross-platform development. Be prepared to discuss specific projects where you've successfully implemented features across different operating systems, as this is crucial for the role.
✨Tip Number 3
Engage with the Mozilla community. Contributing to open-source projects or participating in forums can help you build connections and show your commitment to the field, which may give you an edge over other candidates.
✨Tip Number 4
Prepare to discuss your approach to mentoring and collaboration. As a Senior Software Engineer, you'll be expected to guide junior engineers, so having examples of how you've supported team members in the past will be beneficial.
We think you need these skills to ace Senior Software Engineer, Mozilla VPN (London)
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights relevant experience in software engineering, particularly with C++, Javascript, and cross-platform application development. Emphasise any experience you have with privacy and security principles, as this is crucial for the role.
Craft a Strong Cover Letter: In your cover letter, express your passion for Mozilla's mission to improve the internet. Discuss how your skills and experiences align with the responsibilities of the Senior Software Engineer role, and mention any open-source contributions you've made.
Showcase Your Projects: If you have worked on relevant projects, especially those involving VPNs or networking, include them in your application. Provide links to your GitHub or any other platforms where your work can be viewed, demonstrating your coding skills and contributions.
Prepare for Technical Questions: Be ready to discuss your technical expertise during the interview process. Brush up on your knowledge of full-stack web development and be prepared to solve coding challenges that may relate to the technologies mentioned in the job description.
How to prepare for a job interview at Mozilla
✨Showcase Your Technical Skills
As a Senior Software Engineer, you'll need to demonstrate your proficiency in C++, Javascript, and full-stack web development. Be prepared to discuss your past projects and how you've applied these skills, especially in cross-platform applications.
✨Understand Mozilla's Mission
Familiarise yourself with Mozilla's core mission to make the internet better for people. During the interview, express how your values align with this mission and how you can contribute to their goals, particularly in privacy and security.
✨Prepare for Code Reviews
Expect to engage in discussions about code quality and best practices. Be ready to explain your approach to writing maintainable and efficient code, and how you handle peer reviews. This will showcase your collaborative spirit and technical expertise.
✨Highlight Your Mentoring Experience
Since the role involves mentoring junior engineers, share examples of how you've supported others in their development. Discuss any experiences where you've helped team members overcome challenges or improve their skills.
