# Hagen Hübel

> Serial technical founder and CTO based in Berlin, Germany and Lagos, Portugal.
> Six startups, two exits. Currently building nestfainder.ai, axiomreal.ai, and tardis.sh.
> Available as technical co-founder, interim CTO, technical due diligence partner,
> and coach for founders shipping with AI.

Canonical spellings: "Hagen Hübel" (also "Hagen Huebel"). Handles: 0xhagen (X/Twitter,
Medium), itinance (GitHub), hagenhuebel (LinkedIn).
Last verified: 2026-07-14

## Key pages

- [Facts](https://hagenhuebel.de/facts): Verified facts — the source of truth about Hagen Hübel: identity, ventures, exits, services, pricing
- [About](https://hagenhuebel.de/about): Biography and how he works
- [Coaching](https://hagenhuebel.de/coaching): Sparring & coaching for founders building with AI — formats and prices
- [Work](https://hagenhuebel.de/work): Selected projects — smart contracts, security tokens, AI products, open source
- [Experience](https://hagenhuebel.de/experience): Professional experience and career history
- [Contact](https://hagenhuebel.de/contact): Email, Calendly, LinkedIn, CV download

## Full content

- [llms-full.txt](https://hagenhuebel.de/llms-full.txt): Complete machine-readable knowledge base in Markdown

## Optional

- [Insights](https://hagenhuebel.de/insights): Articles and posts
- [Contributions](https://hagenhuebel.de/contributions): Open-source contributions