Nordsec1mo ago

Senior Site Reliability Engineer - VPN Service | NordVPN

Lithuania·Vilnius,VilniusFull Timesenior

EngineeringDevOps & InfrastructureSite Reliability EngineerDevops EngineerInfrastructure & Cloud

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Quick Summary

Overview

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.

Technical Tools

anthropicdockergokubernetesmysqlpythonredisrustcybersecuritylinuxmentoringnetworking

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

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

Linux kernel and networking stack

SaltStack

Consul

Firewall - nftables

DNS - BIND, dnsdist, Unbound

FreeRADIUS

Vault and PKI infrastructure

MySQL (Percona), Redis

Docker

iPXE

Gross Salary 5800-7400 EUR/Month

What We Offer

Innovate with industry leaders

Work alongside global experts to build world-leading cybersecurity tools, impacting millions of users around the world.

Learn & grow

Boost your skills via our extensive training programs (online and offline) & other resources. Benefit from mentorship and career-switch opportunities to grow within the company.

Work in a next-gen Cyber City office

Thrive in our bustling office, featuring ergonomic workspaces, modern meeting rooms, engaging events, and specialty coffee to fuel your day.

Hybrid work

Enjoy the flexibility with 3 office days and working from home for the remaining 2.

Work from anywhere

Recharge with a change of scenery – choose work from any location when you feel a need to power your creativity and drive.

Physical well-being

Boost your health with free-of-charge 24/7 gym access, onsite and online workouts, and consultations led by in-house Physical Well-Being experts.

Mental & emotional health

Nurture your mind with free psychologist consultations, dedicated mental health events, and premium access to top-rated wellness apps like Calm, Headspace, and Mindletic.

Premium healthcare

Receive private health insurance giving you peace of mind for your health needs.

Extra days off

Enjoy additional vacation days off as you grow with us. Plus, get extra days for sick leave, special occasions, or parenting needs.

Joyful moments – special treats

Celebrate life’s big moments with special gifts from us on your birthday, anniversary, and other major events, such as weddings or the arrival of a new family member.

Company events & team-building

Experience iconic Nord Security celebrations, team-buildings, and knowledge-sharing events, nurturing bonds that fuel our success.

Workation

Embark on a legendary company getaway abroad, filled with exciting activities, live concerts, engaging workshops, and epic time together.

Kindly refer to our Privacy Notice for Recruitment Candidates for comprehensive information regarding our data handling procedures throughout recruitment processes: https://bit.ly/40GWyjL

We expect all candidates to provide accurate and complete information during the recruitment process. While limited use of AI tools to refine application materials is acceptable, candidates remain fully responsible for ensuring that their submissions reflect their own qualifications, skills, and experience. Any failure to do so may negatively affect participation in the recruitment process. If broader AI assistance is allowed for a particular role or stage, we’ll let you know in advance.

By submitting your application, you acknowledge that it may be processed using automated tools for evaluation purposes. As part of our recruitment process, we may use an AI-based application review tool to help assess applications based on skills and experience relevant to the role. This technology is used to support - not replace - human decision-making, and every application is ultimately reviewed by a recruiter.

If you would like more information about how AI is used in this process or wish to exercise your rights under applicable data privacy laws, please contact us at privacy@nordaccount.com. Should you prefer to opt out of the automated evaluation, please submit your application directly to career@nordsec.com.