Systems engineer and security practitioner based in Zagreb, Croatia. Currently Principal Cloud Architect at HAProxy Technologies and Executive Product Manager at Crossvallia.
Over the last 20+ years I have worked as a security advisor and systems integrator, with a focus on Linux internals, high-availability infrastructure, observability and network performance. Previous engagements span the Croatian President's Office, multiple governments, the Croatian National Bank, private banks, ISPs and Alexa top-300 sites.
Education: MSc, University of Zagreb
"If I had 8 hours to chop down a tree, I would spend 6 of those hours sharpening my axe."
- Load balancing & application delivery — day job at HAProxy Technologies.
- Linux & kernel tooling — eBPF, tracing, performance, filesystem behaviour.
- Systems programming — primarily Go and Rust, with C and Python where they fit best.
- Open-source utilities that scratch real operational itches (see below).
| Project | Description | Language | Stars | Forks |
|---|---|---|---|---|
| betteralign | Detect and fix struct field alignment to reduce memory usage in Go programs. | Go | ||
| iSMC | Apple SMC CLI — decode temperature, fans, battery, power, voltage and current on macOS. | Go | ||
| pktstat-bpf | eBPF-based Ethernet traffic monitor using TC, XDP, kprobes and cgroups. | C / Go | ||
| pktstat | Lightweight Ethernet interface traffic monitor and reporter. | Go | ||
| e-dnevnik-bot | Grade/exam alerting bot for the Croatian e-Dnevnik school system. | Go | ||
| findlargedir | Quickly locate flat "blackhole" directories with pathological entry counts. | Rust | ||
| dnstrace | DNS query tracing and analysis tool. | Go | ||
| uptime_hack | Small Linux kernel module that tampers with reported uptime. | C | ||
| axfr2hosts | Fetches DNS zones via AXFR and dumps them in Unix hosts format. |
Go | ||
| minifind | Minimal find reimplementation with the emphasis on speed. | Rust | ||
| secretbro | Interposition library for filesystem access control of Kubernetes secrets directories. | Rust |
- HAProxy Technologies — Business Certified Partner
- LPIC-3: Linux Enterprise Professional
- LPIC-3 304: Virtualization & High Availability
- LPIC-3 300: Mixed Environments
- LPIC-2: Linux Network Professional
- LPIC-1: Linux Server Professional
- SUSE Certified Linux Administrator
- LinkedIn — in/dkorunic
- X / Twitter — @dkorunic
- Bluesky — @dkorunic.net