oleh@holdun:~$
Oleh Holdun
Linux nerd. Infrastructure tinkerer. Open-source advocate. I automate the complex and optimize the hardware, living by the creed of learning through doing.
// about me
I built my technical skills autonomously and hands-on, starting from an IT and telecommunications diploma and continuing to experiment in my own time. My approach is to understand how things work under the hood, which lets me have a deeper insight of the technologies I use. I run a virtualised ecosystem on Proxmox as a continuous lab: every service I add is a chance to learn something new about networking, security, or automation. I speak native Italian and fluent English (C2). I picked up English early on, partly because of the vastly larger pool of technical resources it unlocks. I am looking for a company where I can grow into a reliable technical reference.
// skills
Nginx Cloudflare DNS DHCP SSH TCP/IP Firewall Subnetting
Prometheus Grafana
Bash Python Git Vim systemd Java
Kubernetes Ansible Terraform
// self-hosted infrastructure
Virtualised infrastructure with self-hosted services
Ecosystem on Proxmox VE with deliberate VM/LXC separation: if the VM goes down, the monitoring container stays up and pinpoints the issue. Nginx reverse proxy with Cloudflare Zero Trust tunnel for secure public exposure. Full observability stack with Prometheus, Grafana, node_exporter, and cAdvisor. Ongoing project. Next steps: Ansible for configuration-as-code and a test Kubernetes cluster.
// hardware & personal
A second-hand enterprise workstation, reconditioned and reconfigured from scratch. Understanding layer 0, the physical machine, before installing software on top is part of how I approach technology.
Built from scratch: component selection, cable management, BIOS tuning, OS install. Assembling your own machine gives you a level of understanding of hardware behaviour that pre-builts never do.
Interests
Hardware fanatic: mechanical keyboards, following GPU and CPU release cycles, keeping up with silicon news. Calisthenics and snowboarding: activities that require discipline, gradual progression, and tolerance for failure. The same qualities that come in handy when something still doesn’t work on the third configuration attempt.