Harun Karahan Contact
Rotterdam · Mendix · Solo builder

Product building
is a game.
I play to ship.

Rotterdam-based builder. Mendix by day — helping teams ship mobile apps faster.
Independent by instinct — designing and building thoughtful, useful products.
Taste, systems and momentum. That's the loop.

Get in touch LinkedIn
Harun Karahan portrait
Harun Karahan Builder in Rotterdam. Obsessed with simple, shipped, useful.
Next stop
Málaga 🇪🇸
June 2026 · 36.72°N 4.42°W

Andalusia. Warm sun, slow mornings, new perspective.

Game loop
  1. 01 Observe
  2. 02 Simplify
  3. 03 Build
  4. 04 Release
The human behind the shipping

More than a portfolio.
A system for building.

No fluff. Just values, focus and a few obsessions that keep the work honest.

Mindset

“Expectation creates reality.”

— The rule I build by
Current mode
RotterdamMendixSoloDisciplined

Mobile platform delivery for teams building apps inside Mendix. Reusable foundations, faster releases.

Values
  • — Ethic — do it right when no one's watching
  • — Equalism — everyone gets a fair start
  • — Meaning — ship things that matter
  • — Fun — if it's not fun, you're doing it wrong
Platform scope
React NativeReactAngular

One mobile foundation. Multiple product teams. One consistent experience.

Journey photo
Journey

Travel keeps the eye sharp and the work honest.

Interests
  • Fitness & nutrition
  • Travel & cities
  • Ambient sounds
  • Language learning
  • Product strategy
  • Systems thinking
On craft

“Simplicity is the ultimate sophistication.”

— Leonardo da Vinci
Reads & thinks
  • Systems thinking
  • Product strategy
  • Behavioral design
  • Language & cognition
  • Stoic philosophy
Contact — no sales pitch

If the work feels aligned,
let's talk.

I'm Harun — Rotterdam, Mendix, product loops. Fast replies, honest takes. Email is best.

[email protected] LinkedIn
Usually replies within a day.