System Administrator (Linux)

About the role

We are looking for a proactive Linux System Administrator to design, implement and maintain our Linux‑based server infrastructure. The role requires strong hands‑on skills, a focus on automation and the ability to work independently while collaborating with cross‑functional teams.

Key responsibilities

• Install, configure and maintain Linux servers (RHEL/CentOS, Rocky Linux, Ubuntu, Debian) in on‑premises data‑centers.
• Deploy and manage virtualization platforms such as XCP‑ng, Proxmox, KVM and VMware.
• Administer physical hardware, SAN storage (HPE MSA, Ceph) and backup/disaster‑recovery processes.
• Monitor performance, troubleshoot incidents and ensure high availability of critical services.
• Automate tasks using Ansible, Chef, Bash or Python scripts.
• Maintain infrastructure services including Wildfly, Free‑Radius, DNS, DHCP, Kea, Squid, NFS and LDAP.
• Implement security hardening, patch management and vulnerability remediation.
• Set up monitoring and logging tools (CheckMK, Zabbix, GrayLog, Rsyslog, Grafana).
• Support containerisation and orchestration with Docker and Kubernetes.
• Provide Level 2/Level 3 technical support and document configurations and procedures.

Required profile

• Minimum 3 years of production Linux administration experience.
• Strong knowledge of major Linux distributions and server hardware.
• Hands‑on experience with virtualization, storage and backup solutions.
• Good understanding of networking fundamentals (TCP/IP, DNS, firewalls, VPN).
• Ability to work independently and drive automation initiatives.

Required skills

• Linux (RHEL/CentOS, Rocky Linux, Ubuntu, Debian)
• Virtualisation: XCP‑ng, Proxmox, KVM, VMware
• Storage: HPE MSA, Ceph
• Automation: Ansible, Chef, Bash, Python
• Infrastructure services: Wildfly, Free‑Radius, DNS, DHCP, Kea, Squid, NFS, LDAP
• Security: hardening, patch management, vulnerability remediation
• Monitoring/Logging: CheckMK, Zabbix, GrayLog, Rsyslog, Grafana
• Containers: Docker, Kubernetes
• Version control: Git