Site Reliability Engineer - VPN Service · Mid-Senior· NordVPN

The world’s most advanced VPN, and a whole lot more.

If you’re a curious problem-solver who carves their own path, join the team behind Threat Protection Pro, the NordLynx protocol, and the fastest VPN on the planet—tools that put privacy, security, and control back in people’s hands.

Your impact? Helping millions take back control of their online security, privacy, and data.

NordVPN operates a globally distributed VPN and DNS infrastructure serving millions of users. Your responsibility is the service itself - deploying, managing, and improving VPN nodes worldwide while ensuring every client connection is fast, stable, and secure.

You'll work closely with application teams to guarantee smooth client connectivity end to end. Quality and reliability are the job.

• Deploy and manage globally distributed VPN and DNS services
• Ensure connection quality, stability, and performance across the entire node fleet
• Collaborate with application teams on client connectivity and protocol behavior
• Optimize VPN service performance - kernel tuning, flamechart analysis, profiling
• Manage security posture - firewalls, PKI, certificate lifecycle, hardening
• Manage authentication and authorization infrastructure
• Own configuration management and automated provisioning of infrastructure
• Clear written incident communication and postmortem ownership

• Own critical VPN services end-to-end including architecture, scalability, security and monitoring
• Deliver OKRs and key commitments within agreed timelines
• Write RFCs/ADRs for new features, refactors, etc
• Raises engineering quality through standards, design reviews, knowledge sharing and mentorship
• Balances reliability, security and delivery speed with strong operational judgment
• Advanced networking - VPN protocols, tunneling, routing, DNS
• Linux at depth - kernel internals, tuning, module management
• Firewall management
• Performance analysis - flamecharts, profiling, bottleneck identification
• OSI model fluency - L2 through L7, TCP/IP stack, SSL/TLS
• Security fundamentals - PKI, certificate management, hardening
• Authentication and authorization - RADIUS, access control
• Configuration management and automated deployments
• Load balancing and failover for distributed services
• Docker

Nice to have

• Python programming
• C, Rust, or Go - for lower-level service and performance work
• Observability knowledge - monitoring, metrics, logging for VPN services
• On-demand bare-metal/hardware provisioning
• eBPF, strace, and advanced debugging/tracing tools
• Virtualization - KVM, MicroVM
• Kubernetes networking
• Interest in AI tooling - Claude Code, agentic engineering, LLM integrations in engineering workflows

• Sharpen your edge Growth is built into how we work. Extensive online and in-person training programs, access to platforms like Coursera and Skillshare, a mentorship program, and internal career moves when you’re ready for something new — your development has no ceiling here.
• Take the time you need Rest isn’t a reward — it’s part of the deal. Enjoy extra vacation days that grow with your time here, plus additional days off for sick leave, special occasions, and parenting.
• Get premium healthcare Your health shouldn’t be something you worry about. We provide premium private health insurance so you have peace of mind and fast access to care whenever you need it. Available in Lithuania and Poland.
• Protect your peace A peaceful mind isn’t a luxury — it’s the foundation. We provide free subscriptions to top-rated Calm, Headspace, and Mindletic apps, offer resilience and mindfulness trainings, and run dedicated mental health events.
• Own your fitness Feeling good shapes how you work, think, and create. That’s why we offer in-house gyms, Multisport and Urban Sport cards, and online workouts. Need something tailored? Our Physical Well-Being experts are here with group mobility sessions, fitness guidance, and one-on-one consultations.
• Pack your bags for workation Picture this: the entire company flies out abroad. The days are packed with workshops, activities, concerts, and real time together. It’s legendary. If you’ve heard stories, they’re probably true.
• Work from anywhere New surroundings spark new thinking. When you need a reset, switch location and work from wherever keeps you sharp, creative, and in the zone.
• Celebrate your milestones The moments that make life special shouldn’t pass quietly. Birthdays, work anniversaries, weddings, new family members — each is marked with a special gift.
• Parent with ease When you’re a parent, the juggle is real. To make it smoother, we organize summer camps for the little ones and offer flexibility that lets you show up both for your family and your team.
• Join the party It never gets boring here. Get ready for team buildings that bring people closer, year-round company events that are equal parts educational and energizing, and the highlights everyone waits for — our iconic summer and winter celebrations.
• Unlock Cyber City Whether Vilnius-based or visiting from remote, our Vilnius HQ is fully yours to enjoy. Need focus? Silent room. Need energy? Open gyms. Need a break? Game room, music room, coffee bar. It’s a modern workspace built with your comfort in mind.