Our client, a leading German telecommunications and IT services provider, is pioneering solutions in web hosting, cloud computing, and internet services. Dedicated to innovation, the company is driving advancements in connectivity, including the rollout of cutting-edge 5G technology. As part of their strategic expansion, they are establishing a European Technology Center in Poland to bolster operational capabilities.

Hybrid Work Schedule: 2-3 days per week in-office, with locations available in Warsaw, Katowice, Poznań, Rzeszów, Łódź, and Lublin.

Senior System Administrator

Your responsibilities

• Key Responsibilities:
• Manage critical infrastructure in compliance with German regulations.
• Conduct background checks for all employees per German law §165 Telekommunikationsgesetz.
• Full-stack operations management: oversee operating systems, configuration management, applications, databases, and customer care interfaces.
• Operate auxiliary systems for monitoring, statistics, alarming, logging, protocol analysis, and security (DNS threat intelligence).
• Participate in 24/7 on-call duty to ensure uninterrupted operations.

Our requirements

• Operating Systems: Proven experience in Linux system administration, preferably Debian.
• Scripting: Proficiency in Bash, Perl, or Python for solving complex tasks.
• Monitoring: Experience with Prometheus and Grafana.
• Version Control: Familiarity with Git and GitOps workflows.
• Containers & Orchestration: Knowledge of containerization and Kubernetes fundamentals.
• High Availability (HA) & Distributed Systems: Skills in designing and operating HA/distributed systems.
• Configuration Management & Automation: Proficiency in Ansible and/or Puppet.
• Networking: Strong knowledge of network fundamentals.
• Database Management: Familiarity with MariaDB and Redis.
• Experience with Voice over IP (VoIP) protocols and telephony systems (soft switches, PBX solutions like Kamailio or Asterisk).
• Knowledge of load balancing with HAProxy and keepalived/IPVS.
• Hands-on experience operating ELK/OpenSearch clusters.
• Familiarity with alarm management tools like Icinga, Check_MK, and Alertmanager.
• German language skills at a B2 level or higher.