Senior Linux Administrator – hybrid Bucharest

The role

We are looking for a Linux System Engineer / Infrastructure Engineer to manage and support complex on-premises Linux environments, primarily based on RHEL. The role involves system administration, automation, virtualization, monitoring, and troubleshooting, with a strong focus on infrastructure stability, security, and performance. Administer, monitor, and support on-premises Linux systems (mainly RHEL, with occasional OEL). Perform system provisioning, patching, performance tuning, security hardening, and advanced troubleshooting. Automate system administration tasks using Ansible and related tools. Manage and maintain Red Hat Satellite, IDM, and other RHEL ecosystem components. Support virtualization environments, primarily VMware and KVM. Deploy, configure, and maintain Linux-based network and security services, including: DNS; Reverse proxy (Apache HTTP, NGINX, HAProxy); Forward proxy (Squid); Load balancers (HAProxy, Keepalived) Manage Linux infrastructure metrics and alert setup in monitoring solutions such as Zabbix and ELK. Support containerized environments using Podman and Docker; experience with Kubernetes is a strong plus. Collaborate with network teams to ensure secure and efficient operations; strong network infrastructure knowledge is essential.

What we expect

• 5+ years of experience in Linux systems administration, with focus on RHEL environments.
• Proven experience with automation tools, especially Ansible.
• Solid knowledge of VMware and KVM hypervisors.
• Strong understanding of networking fundamentals, including firewalls, routing, and VLANs.
• Experience managing enterprise-level monitoring and logging tools.
• Red Hat certifications (RHCSA, RHCE) are a plus.