IT Technician & Homelab Enthusiast Apprentice IT Specialist at the German Cancer Research Center (DKFZ)
j551n.com · blog.j551n.com · gitlab.j551n.com · johannes.nguyen@j551n.com
System administrator focused on automation, infrastructure, and self-hosted services. Currently completing an apprenticeship as IT Specialist at DKFZ Heidelberg, working on Linux systems, virtualization, and internal tooling.
3+ years hands-on with Linux · 50+ VMs managed · 12+ self-hosted services in production
| Area | Tools |
|---|---|
| Infrastructure | Linux, Proxmox, VMware, Kubernetes, Docker, LXC, Ceph |
| Networking | VLANs, LACP, pfSense, Cloudflare, Netbox, IPAM |
| Automation | Ansible, AWX, GitLab CI/CD, GitHub Actions, Bash |
| Development | TypeScript, Next.js, React, Python, Bash |
| Monitoring | Grafana, InfluxDB, Prometheus |
| Service | URL |
|---|---|
| GitLab | gitlab.j551n.com |
| Docker Registry | repo.j551n.com |
| Documentation | docu.j551n.com |
| Monitoring | monitor.j551n.com |
| Vaultwarden | vault.j551n.com |
