DevOps engineer. Servers, automation, code.
Started on networks, now I write code and automate everything I can —
from network to deploy. Linux, Docker, PHP, CI/CD.
DevOps Engineer & Full-stack Developer at ICT Solutions · Slovakia 🇸🇰
- Proxmox VE + Ceph — HA clusters, cross-cluster VM migrations, cloud-init templates, node lifecycle and upgrades
- Monitoring at scale — LibreNMS with distributed pollers, RRDCached and SNMP tuning; Prometheus, Grafana, Loki and Alertmanager on top
- Containerised platform services — Docker Swarm stacks running PowerDNS, FreeRADIUS with Duo MFA, Nginx, Bitwarden and BookStack
- Backup & DR — enterprise backup and Backup-as-a-Service delivery, including regular restore testing
- CI/CD & automation — Ansible, GitHub Actions, Bash and Python tooling, multi-arch image pipelines with Trivy scanning and SBOM attestation
- Web development — CodeIgniter 4 + HTMX applications, Astro sites, internal dashboards and tooling
Infrastructure
Networking & monitoring
Code
Actively maintained — containers, exporters and tooling running in production at ISP and enterprise scale, mostly under @ict-solutions-dev.
| Project | What it is | Activity |
|---|---|---|
| docker-duoauthproxy | Containerised Duo Authentication Proxy — ENV-first configuration, Docker secrets, multi-arch builds, Trivy scanning, SBOM and build provenance attestation |  |
| alertmanager-webhook-signal | Go webhook that delivers Prometheus Alertmanager alerts straight to Signal |  |
| docker-freeradius | FreeRADIUS container tuned for ISP deployments |  |
| freeradius_exporter | Prometheus exporter for FreeRADIUS metrics |  |
| rebjak.com | My personal site and blog — Astro 5, Tailwind v4, full i18n, PageSpeed 100/100/100/100 |  |
Also maintained: codeigniter-freeradius and codeigniter-breadcrumbs — helper libraries for CodeIgniter 4.
Most of my day-to-day work lives in private and internal repositories. There is more on rebjak.com/portfolio.
- PPPoE sessions from Cisco ASR1000 in LibreNMS: a custom v2 plugin Sep 18, 2026
- NVIDIA DGX Spark — first boot and local LLM inference Mar 23, 2026
- PageSpeed 100 on GitHub Pages — from 87 to a perfect score Mar 8, 2026
- SEO for an Astro blog — OG images, JSON-LD and noindex Mar 7, 2026
- GitHub release process for small projects Mar 7, 2026
- 🎉 Merged PR #51 in jozefrebjak/rebjak.com
- ℹ️ Assigned PR #51 in jozefrebjak/rebjak.com
- 🚀 Published release v1.0.0 in jozefrebjak/librenms-plugin-cisco-pppoe
- 💪 Opened PR #51 in jozefrebjak/rebjak.com
- 🎉 Merged PR #1 in jozefrebjak/homeassistant-bluetooth-mesh