Hi, I'm Johannes.

iOS, full-stack, and AI — from the heart of Berlin.

Innovator
Developer
Trainer
Johannes Fahrenkrug speaking at the NSSpain conference in 2022

Problem Solver

I untangle tricky bugs and performance bottlenecks across iOS, frontend, and backend systems.

Skill Builder

I help teams get up to speed with iOS and practical AI. Always hands-on, never 'death by PowerPoint.'

Craftsman

I care deeply about clean, maintainable code and the small details that make software a pleasure to work with.

Recommendations

Through the years I have received praise from several kind professionals I had the pleasure of working with.

  • Johannes met and exceeded our expectations. Johannes is simply a very creative, professional and talented developer.

    —Viktor Petersson

  • In brief, in working with Johannes I had the rare opportunity to work along side a brilliant and professional individual [...].

    —Richard Perez

  • Johannes is a very professional guy who quickly comes up with results that exceeded my expectation.

    —Nikolaus Pohle

  • It's disappointingly rare to find engineering talent of the kind Johannes possesses.

    —John Fox

  • Johannes is that perfect mix of an author with a deep technical understanding, who also has the ability to express complex ideas in a simple way for readers.

    —Troy Mott

  • Johannes is one of the most meticulous IT consultants who I have come across. [...] His knowledge and visibility in the IT industry is large and he has always been a professional with high integrity.

    —Patrick Boden