System Engineer / Site Reliability Engineer | 1

Inetum · Warsaw, Poland · full-time · Remote · May 26, 2026

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Posted May 26, 2026 · Read from Inetum
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Job Description

Join our team as a key contributor responsible for the end-to-end operation of approximately 700 systems across TEST, AC1, PreLIVE, and LIVE environments. You will work in a highly automated, performance-driven infrastructure, ensuring stability, scalability, and continuous improvement of our VoIP and Radius platforms.

As part of our team, you will:

  • Operate, maintain, and enhance VoIP and Radius systems within high-performance data centers
  • Develop and improve automated system management using Puppet and Debian-based server clusters
  • Drive projects within the VoIP and Radius environment across their full lifecycle — from design and implementation to deployment
  • Perform performance analysis and optimization to ensure system efficiency and reliability
  • Plan and execute rollouts of new features and system updates
  • Carry out regular maintenance activities (system expansions, updates, upgrades)
  • Analyze, troubleshoot, and resolve technical issues in a structured and goal-oriented manner
  • Coordinate with upstream providers by creating and managing trouble tickets
  • Participate in an on-call rotation (additional compensation provided)

Qualifications

You are an experienced IT professional with strong Linux expertise and a passion for open-source technologies. Ideally, you bring:

  • A degree in Computer Science, Natural Sciences, or a comparable qualification
  • Several years of experience in IT operations (FOSS systems or Site Reliability Engineering)
  • Strong expertise in Linux administration, especially with clustered environments
  • Practical experience with ITIL processes (Incident, Problem, and Change Management)
  • Solid understanding of networking (TCP/IP, UDP)
  • Scripting skills (Bash, Python, Perl) for automation
  • Strong analytical and troubleshooting skills
  • Experience with virtualization (e.g. KVM, Proxmox, oVirt, OpenStack) – nice to have
  • Knowledge of VoIP technologies and telephony systems (e.g. Asterisk, Kamailio) – a plus
  • Experience with FreeRADIUS – a plus
  • Knowledge of MySQL / MariaDB administration
  • A proactive, service-oriented mindset and ability to quickly understand complex systems
  • Good English skills (written and spoken); basic German is an advantage

Additional Information

We hereby inform you that Inetum Polska sp. z o.o. has implemented an internal reporting (whistleblowing) procedure. The content of the procedure and the possibility to submit an internal report are available at:

https://inetum.whispli.com/speakup?locale=pl

Employer
Inetum
Location
Warsaw, Poland · Remote
Contract
full-time