Lead System Admin

When infrastructure fails, businesses stop. That's why we're looking for a Lead System Administrator who wants to take full ownership of a modern, on-premise SaaS environment and lead it into its next phase of maturity.

This is not a "keep-the-lights-on" role. You'll be the technical and operational owner of a high-availability platform used daily by thousands of professionals. You'll lead a distributed team, make strategic infrastructure decisions, and stay hands-on where it matters.

What you'll do

• Lead and mentor a distributed team of senior system administrators
• Own and evolve a large-scale on-prem infrastructure (performance, reliability, security)
• Design and enforce technical standards, automation and best practices
• Drive stability, scalability and high availability across multiple environments
• Proactively identify risks and bottlenecks before they impact production
• Act as the go-to decision maker for infrastructure architecture and roadmap

Your toolbox

• Linux (Debian/Ubuntu), Kubernetes (must-have), Docker
• Proxmox, Ceph (strong plus), on-prem data centers
• Prometheus, Grafana, ElasticSearch
• Networking, firewalls, mail systems, security
• CI/CD and automation mindset

• A senior infrastructure professional with 10+ years of real-world experience
• A hands-on leader who enjoys being close to the systems and the team
• Experienced with complex, high-availability SaaS environments
• Someone who has seen multiple infrastructures - not just one setup for years
• Practical, proactive and calm under pressure
• Leadership is essential, attitude even more so

• Hybrid working (Amsterdam + remote)
• Strong pension, generous holidays and time-for-time on-call compensation
• Clear growth path towards infrastructure or architecture leadership

If you're ready to take the lead, keep your feet in the mud, and build systems that truly matter - this role is for you.