Senior VPN Software Engineer at Surfshark (Vilnius, Lithuania)Senior VPN Software Engineer

Join Surfshark's VPN Engineering team to build and scale the core software powering our global infrastructure. You will own key stack components, optimize high-performance tools like WireGuard and HAProxy, and work with SRE to maintain a fast, secure fleet of thousands of servers. This role offers deep technical ownership, from kernel tuning and eBPF programming to architecting low-latency protocol extensions.

If you want to:

• Design and scale our proprietary VPN software (SDN, Dausos, WCB) and extend tools like WireGuard and HAProxy;
• Dig into the Linux networking stack, debug it, and tune it for high-scale traffic while maintaining custom Debian images;
• Write eBPF programs for packet processing and architect systems for ultra-low latency and high throughput;
• Lead R&D on custom protocol extensions and optimizations, drive large-scale refactoring, and set the coding standards others follow;
• Work with SRE team to automate a global fleet through Ansible deployments and custom CI/CD pipelines.

And you can check off:

• Proven experience tracing complex production issues across code, OS, and service boundaries;
• Proven experience architecting solutions that hold up across thousands of servers;
• Programming skills in Go and/or C;
• Hands-on work with Ansible and a solid grasp of scalable deployment architectures.

Here’s the deal:

• Growth and learning opportunities: time dedicated to learning, conferences, online learning platforms, and books for your professional development;
• Health and wellness: we want you to feel and be your best. That's why we offer various benefits, from online workouts, a physical coach and a gym to regular mental health checks;
• Tools of your choice: choose technical equipment and the tools you need to do your best;
• Community and celebrations: get ready for long-lasting traditions such as yearly workation, Friday get-togethers, various team buildings and company celebrations;
• Convenient commuting: traveling from point A to point B can be a pain. That’s why, depending on your unique circumstances, we compensate part of your public transport costs;
• Work-life balance: We encourage working in the office, with the possibility of up to two remote days per week. Plus, with our WFA policy, you can work from almost anywhere in the world;
• Premium Surfshark accounts: for you, your family, and friends;
• Gross salary: 4750 - 7000 Eur/month for the Lithuanian market, 21900 - 33400 Pln/month for the Polish market. It may vary depending on your skills and experience.