Senior IT Infrastructure Engineer (m/f/d) (IT-Systemadministrator/in)

Your Responsibilities

• Infrastructure Architecture & Operations: Design, implement, and maintain on-premise IT infrastructure (compute, storage, networking). Perform capacity planning and develop/execute backup and disaster recovery strategies. Maintain comprehensive infrastructure documentation.
• Physical Data Center & Cloud Infrastructure: Manage and monitor on-premise IT facilities (servers, cooling, power) and hardware. Design and provision storage and compute/GPU infrastructure for high-performance workloads (ML/AI).
• Enterprise Networking: Design and implement WAN/LAN/WiFi network topology with proper segmentation and security controls (firewalls, IDS/IPS). Configure and manage enterprise networking equipment (switches, routers, load balancers).
• System Administration & Support: Deploy and manage Linux server infrastructure. Configure and deploy employee workstations (Linux, macOS, Windows) and manage IT equipment procurement. Provide technical troubleshooting and support. Manage user accounts with SSO.
• Vendor Management: Establish and manage relationships with technology vendors, negotiate contracts, and coordinate with service providers (ISPs, colocation).

Essential Skills

• Proven track record in building or transforming infrastructure.
• Deep expertise in enterprise networking (WAN/LAN, VLANs, routing, switching, firewalls, VPNs).
• Strong hands-on experience with server hardware assembly, configuration, and maintenance.
• Expert knowledge of storage (RAID, SAN/NAS) and backup/recovery solutions.
• Experience with Linux server administration and troubleshooting.
• Solid understanding of data center operations (power, cooling, security).
• Hands-on experience provisioning and managing GPU infrastructure.
• Scripting skills (Python, Bash) for automation.
• Experience with Infrastructure-as-Code (Terraform, Ansible).
• Strong problem-solving and troubleshooting skills for complex hardware and network issues.
• Excellent documentation and communication skills.
• Self-motivated and able to work independently in a fast-paced environment.