Hi, I’m Johann.
Developer with an eye for design. Who?

As Lead Software Engineer I run Team Web Frontends at Finanzfluss. On the side, I build open source and products of my own – most recently TOON, a data format for LLMs.

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Writing

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A Shoelace for the Wedding

👟 Forgotten belt, slipping trousers – and then a shoelace saved my wedding. Reflecting on May 17, Julia and me.

What I Wish for in My Thirties

I spent my twenties changing careers and building my professional life. Now I want to follow my dreams.

A Practical Guide to Prompt Engineering

🧮 Artificial intelligence gives the best results with clear instructions. Let me show you some best practices.

How I Learned to Trick My Ambition

🎥 Filming and editing without aim or purpose lets my creativity unfold. A long way to get here.

Photographs

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Two blue street signs reading "Großschener Berg" and "Caasener Weg" against a dense background of white flowering roses.
A woman in motion blur walks through an elegant room with a crystal chandelier, wall murals, and parquet floor, while other people are visible in the background.
A modern office phone booth with glass doors, table and benches in gray felt, topped with a golden hippopotamus figurine.
Monumental black lion sculpture in polygonal low-poly style being worked on by two workers, with colorful Venetian houses with tiled roofs and spring greenery behind it.
Venetian residential building in terracotta orange with Gothic pointed arch windows and green shutters on a canal, yellow flowers on the balcony and metal structures on the roof.
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