Linux-Administrator (m/f/d)

STREIT GmbH is one of the leading safety and health services in Germany. As an owner-managed family-run company, our nation-wide successful, cross-industry support in addition to customer-specific concepts and innovative solutions is based on the experiences and motivation of our employees. For our headquarters in Bensheim we are looking for a full-time Linux Administrator (m/w/d) Data center operation · On-Premise · Full time

Why us? We think IT consciously different: Our entire infrastructure runs in our own data center – consistently according to a zero cloud strategy. This is not a renunciation for us, but an attitude. Data sovereignty, full control of any service and maximum independence from external providers are the cornerstone of modern IT for us. With us you do not work with Blackboxes, but with an infrastructure that you fully understand and actively shape. For our infrastructure team we are looking for an experienced personality who not only runs Linux but lives.

Operation and further development of our virtualized infrastructure on Proxmox VE – from resource planning to high availability Design, operation and scaling of our distributed storage system with Ceph for high performance and fail-safe storage Responsibility for the reliable operation of our data center (physical systems, network, backup) Administration of our Zimbra mail server incl. Postboxes, filtering, anti-space and backup Support and further development of our Nextcloud platform for file exchange and collaboration Configuration and backup of our web server (Apache, Nginx) incl. Reverse proxy and TLS certification management Building a meaningful monitoring & Alertings (e.g. Prometheus/Grafana, Icinga, Zabbix) for proactive operation Administration of our central identity and rights management directory services (OpenLDAP, FreeIPA or Samba AD) Management and curing of our Linux client systems – from automated rollout to support Automation of Recurring Processes with Ansible, Bash and Python – “Infrastructure as Code” is not a Buzzword for you

Found experience in the administration of Linux servers (e.g. Debian, Ubuntu, RHEL/Rocky/AlmaLinux) Practice know-how in Proxmox VE and ideally Ceph or comparable distributed storage solutions Experience with several of our core services (Zimbra, Nextcloud, Webserver, Monitoring, Directory Services) Secure networking, firewalls, DNS, certificates and backup concepts Experience with automation and configuration management (Ansible or A.) Analytical, independent functioning and the motivation to develop a fully self-operated infrastructure Good knowledge of German; English for technical documentation

An independent, modern IT landscape without cloud dependencies – work on real technical substance Responsibility and real design space from day one A well-established team, flat hierarchies and short decision paths Current hardware and consistent focus on open source technologies A secure, future-oriented workplace with a long-term perspective