Nordsec
Nordsec1mo ago

Senior Site Reliability Engineer - VPN Service | NordVPN

Warsaw,WarsawFull 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,

Technical Tools
EngineeringDevOps & InfrastructureSite Reliability EngineerDevops EngineerInfrastructure & Cloud
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 23300 - 34000 PLN/Month.

    • Location & Eligibility

    Where is the job
    Warsaw
    Hybrid — some on-site time required
    Who can apply
    Open to applicants worldwide
    Listed under
    Worldwide

    Listing Details

    Posted
    April 3, 2026
    First seen
    April 3, 2026
    Last seen
    May 5, 2026

    Posting Health

    Days active
    31
    Repost count
    0
    Trust Level
    25%
    Scored at
    May 5, 2026

    Signal breakdown

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    Employees
    5
    Domain
    nordsec.pl
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    NordsecSenior Site Reliability Engineer - VPN Service | NordVPN
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