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Salary
$60k – $99k per year (gross)
Location
In office (Vilnius, Kaunas)
Seniority
Senior
Employment
Full-Time

First seen by Alion on Nov 11, 2026.

Overview
Company
Impact
Profile match
Tesonet is a Lithuanian technology accelerator and holding founded in 2008 and headquartered in Vilnius. It builds and scales software businesses in cybersecurity, data and consumer products. Several of the largest Lithuanian technology companies grew out of it.

Job Description

Surfshark's VPN runs on thousands of servers worldwide, from the bare-metal infrastructure up, and the VPN Engineering team keeps every layer fast and dependable. We're looking for a Senior SRE to keep that global infrastructure resilient, secure, and high-performing at scale. You'll automate the deployment and management of a distributed fleet, sharpen observability and anomaly detection, and work shoulder to shoulder with software engineers on the backbone of an always-on service. This is a hands-on role for someone who treats reliability as an engineering discipline, not a fire drill, and enjoys large-scale automation, Linux networking, incident response, and performance tuning in complex production environments.

  • Automate and scale the deployment of thousands of VPN servers across a global fleet, and design out single points of failure;
  • Build reliable monitoring, logging, and anomaly detection that catches issues before they become incidents;
  • Troubleshoot complex issues across Linux systems, networking, VPN protocols, and proxy layers;
  • Reduce repetitive manual work with automation and internal tooling, from scripts to n8n workflows and Jira integrations;
  • Partner with software engineers to optimize the infrastructure and improve tooling, CI/CD, and reliability processes;
  • Lead incident response, postmortems, disaster recovery readiness, and long-term performance work.

Requirements

  • Proven experience in SRE or similar roles, with real ownership of production-critical systems at scale;
  • Strong Linux systems and networking knowledge, including DNS, VPNs, routing, firewalls, and proxies;
  • Solid experience with Ansible and infrastructure automation in production, and scripting skills (Bash/Python) for operational automation;
  • Experience with monitoring, logging, and troubleshooting performance and reliability issues at scale;
  • Familiarity with GitLab CI/CD, incident management, disaster recovery, and secure infrastructure practices;
  • Comfort using AI tools (Claude, Cursor, GitHub Copilot) to reduce manual work, and the judgment to check their output for security and performance.

Nice to have

  • Have experience with bare-metal provisioning and network boot (iPXE/PXE), hardware lifecycle, and out-of-band management;
  • Have coordinated with hosting or colo providers through remote-hands and provider APIs;
  • Have operated other latency-sensitive, globally distributed services, or driven cross-team architecture decisions.

Company offers

  • Growth and learning opportunities: time dedicated to learning, conferences, online learning platforms, and books for your professional development;
  • Health and wellness: we want you to feel and be your best. That's why we offer various benefits, from online workouts, a physical coach and a gym to regular mental health checks;
  • Tools of your choice: choose technical equipment and the tools you need to do your best;
  • Community and celebrations: get ready for long-lasting traditions such as yearly workation, Friday get-togethers, various team buildings and company celebrations;
  • Convenient commuting: traveling from point A to point B can be a pain. That’s why, depending on your unique circumstances, we compensate part of your public transport costs;
  • Work-life balance: We encourage working in the office, with the possibility of up to two remote days per week. Plus, with our WFA policy, you can work from almost anywhere in the world;
  • Premium Surfshark accounts: for you, your family, and friends;
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