Senior Site Reliability Engineer - Traffic Engineering | NordVPN

TLDR

Support millions of users by ensuring reliable and quick access to online security tools, optimizing load balancing and traffic shaping systems globally.

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.  Main Responsibilities
  • Ensure content accessibility across a globally distributed edge infrastructure
  • Design, operate, and improve load balancing and traffic shaping systems at scale
  • Troubleshoot connection, latency, and accessibility issues end to end
  • Own HTTP traffic flow - from client to edge to origin and back
  • Investigate and resolve website and service reachability problems
  • Work across protocol layers to diagnose issues at the right depth
  • Core Requirements
  • Load balancing and traffic shaping - architecture, algorithms, health checking, failover
  • NGINX and/or HAProxy - configuration, tuning, debugging in high-traffic environments
  • Networking fundamentals - DNS, routing, firewall, packet capture and analysis
  • OSI model fluency - comfortable working across L3–L7, TCP internals, SSL/TLS handshake and termination
  • SaltStack
  • Linux administration
  • Python programming - automation, tooling, scripting
  • Troubleshooting network and application-layer issues in production at scale
  • Observability knowledge - metrics, logging, and monitoring for traffic systems
  • Docker knowledge - full lifecycle and dependency management with advanced networking
  • Bonus Points For
  • Advanced networking - anycast, BGP, traffic engineering at the network layer
  • Deep understanding of the HTTP protocol - HTTP/1.1, HTTP/2, HTTP/3, WebSocket, connection lifecycle
  • Proxy protocols - PROXY protocol v1/v2, reverse proxy patterns, header propagation
  • Salary Range
  • Gross Salary 23300 - 34000 PLN/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. 

    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
    Fuel your active lifestyle with online workouts led by our Physical Well-Being experts. Unlock a variety of sports and wellness facilities, like gyms, swimming pools, and fitness classes, with the Multisport card.  

    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.
     
    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.

    Health Insurance

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

    Learning Budget

    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.

    Mental health support

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

    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.

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    Salary
    23 300 zł – 34 000 zł per month
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