Nord Security
Senior Site Reliability Engineer - VPN Service | NordVPN
TLDR
Work on deploying, managing, and improving globally distributed VPN nodes ensuring fast, stable, and secure client connections for millions of users.
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.
Main Responsibilities
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
Core Requirements
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
Bonus Points For
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
Tools You Will Use
Linux kernel and networking stack
SaltStack
Consul
Firewall - nftables
DNS - BIND, dnsdist, Unbound
FreeRADIUS
Vault and PKI infrastructure
MySQL (Percona), Redis
Docker
iPXE
Salary Range
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 [email protected]. Should you prefer to opt out of the automated evaluation, please submit your application directly to [email protected].
Benefits
Flexible Work Hours
Enjoy the flexibility with 3 office days and working from home for the remaining 2.
Free Meals & Snacks
Thrive in our bustling office, featuring ergonomic workspaces, modern meeting rooms, engaging events, and specialty coffee to fuel your day.
Health Insurance
Receive private health insurance giving you peace of mind for your health needs.
Free mental health consultations and wellness app access
Nurture your mind with free psychologist consultations, dedicated mental health events, and premium access to top-rated wellness apps like Calm, Headspace, and Mindletic.
Paid Time Off
Enjoy additional vacation days off as you grow with us. Plus, get extra days for sick leave, special occasions, or parenting needs.
Nord Security builds advanced digital security and privacy solutions, including services like NordVPN and NordPass, aimed at protecting both individuals and businesses around the globe. With a focus on empowering users to take control of their online safety, our products are trusted by millions for secure browsing, data protection, and identity theft prevention.
- Founded
- Founded 2012
- Employees
- 500+ employees
- Industry
- Professional Services
Senior Site Reliability Engineer