About

Radek Kargul

Software Engineer · Fitness Coach · International Speaker

Bio

I am a software engineer based in the Netherlands, working at the intersection of AI and developer tooling. My focus is on building software that makes engineers more effective — faster feedback loops, better abstractions, tools that reduce cognitive load without sacrificing control.

Outside of software, I am a certified group fitness instructor. I teach HIIT, strength and conditioning, and mobility classes in Delft, Rotterdam and The Hague. My coaching philosophy is simple: consistency beats intensity, movement quality matters more than load, and the best program is the one you will still be doing in six months.

I also speak internationally at conferences and events on AI and software, and fitness. I believe the same principles that make athletes sustainable apply directly to how we build software teams.

Current focus

AI engineering

Building LLM-powered systems and tooling for software teams.

Talks

2026

Voxxed Days Luxembourg — Introduction to ML Development for Software Engineers

Invited speaker.

2026

Devoxx Poland — Building Secure AI Agents with Quarkus LangChain4j

2026

Devoxx Poland — Debugging Your Health: Fitness for Desk Warriors

2026

Voxxed Days Zurich — Debugging Your Health: Fitness for Desk Warriors

2025

Devoxx Belgium — Building Secure AI Agents with Quarkus LangChain4j

2025

JNation Coimbra — Introduction to ML Development for Software Engineers

2025

LunaConf Rotterdam — Debugging Your Health: Fitness for Desk Warriors

2024

LunaConf Rotterdam — Introduction to ML Development for Software Engineers

Personal

Based in

Netherlands

Tech

JVM, AI

Fitness

Strength training, HYROX, Cycling, HIIT