Fabian Bitzer

Fabian Bitzer

Fabian Bitzer smiling in a brown hoodie under the arches of an arcade.

I build software with AI. And show what actually works.

Write me

I am Fabian. As CTO of BLUNATECH GmbH I build AI software for small businesses, plus my own apps like BerichtsheftKI. On YouTube I test new AI tools every week. What convinces me ends up in my projects.

What I do

  1. 01Build

    Product and engineering at BLUNATECH, from architecture to operations, plus my own apps from the first idea to the store release.

  2. 02Test

    New models and coding tools get real tasks before I recommend them. That is why I am building my own benchmark.

  3. 03Explain

    On YouTube and in trainings I show how to use AI productively. In German, without marketing speak.

Milestones

  1. 2022
    • January Started the YouTube channel ichbinfabian
  2. 2023
    • September Enrolled at DHBW Mannheim
    • Registered my first small business
  3. 2025
    • June CTO and technical lead of BLUNATECH GmbH
  4. 2026
    • April Karla goes live on karlsruhe-erleben.de, BerichtsheftKI launches in the App Store
    • July Bachelor's thesis graded 1.1, the MMK Chatbot as its practical part goes live
    • August Sharehood in the App Store and on Google Play, CLEW Agent goes into production
    • September Graduated from DHBW Mannheim, production start of CLEW NFC, around 11,200 subscribers

Background

  • Studies, 2023 to 2026 DHBW Mannheim Bachelor's thesis, graded 1.1, on a hybrid, privacy-compliant RAG architecture for public universities. The MMK Chatbot is its practical part.
  • Reference Deutsche Bahn AI enablement and Copilot trainings for teams.

Tools I build with

  • Claude Code
  • Codex
  • Next.js
  • Astro
  • Flutter
  • Supabase
  • Postgres
  • Qdrant
  • FastAPI
  • Remotion
  • Premiere Pro
  • Whisper
  • Trigger.dev
  • Vercel
  • OpenRouter
  • RevenueCat
  • Stripe
  • PostHog
Fabian Bitzer standing at a lectern with a laptop in a lecture hall, smiling.
Claude Code Codex Q&A
And sometimes I stand at the front and explain what the tools can really do.

Want to build something together? Write to me.

kontakt@bitzer-fabian.de

Also on YouTubeLinkedInGitHub