Hi. I'm Hagen.
Serial technical founder.
I turn ideas into companies — from zero to product-market fit to team to exit. I've done it four times. Today I'm building nestfainder.ai and selectively working with founders who need a technical co-founder or CTO-level partner.
nestfainder.ai
Germany · Portugal
Decoding global urban data to help people find where they truly belong. Open to the right collaborators.
TokenForge
Germany
Started alone, found the first customers, reached PMF. Added two co-founders, built the team, brought in investors. Sold my shares in 2023.
Undisclosed (Exit)
Switzerland
Built a micropayment product on e-money infrastructure. Closed the first major enterprise client, hit €1M ARR in year one, then exited.
The studios behind the ventures
itinance GmbH
Venture studio, consulting & funding · Berlin. Where the prototypes get built, clients get consulted, and the first checks get written.
itinance.com ↗opendeluxe ventures
Incubator & builder. The company builder behind the ventures — incubating and spinning out what works.
opendeluxe.com ↗I help founders ship faster, avoid costly architectural mistakes, and build teams that scale. This includes hands-on interim CTO roles, technical co-founding, and due diligence for investors and acquirers — assessing codebases, architecture, and engineering teams across crypto, healthtech, and VC-backed startups. If you're building something ambitious and need a senior technical partner, I want to hear from you.
nestfainder.ai
Location intelligence platform · Jan 2026 – present
Decoding global urban data to help people find where they truly belong.
Leveraging AI and advanced semantic analysis to score 22,000+ cities worldwide across quality of life, safety, healthcare, and political stability. More than just a search engine—it's a data-driven framework for modern mobility.
Solo-build, launched January 2026.
Let's build something together.
I'm actively looking for the right co-founding opportunity, interim CTO engagement, or advisory role. If you're working on a hard problem and need someone who has been there before — from zero to exit — reach out.
Thoughts from LinkedIn and Medium.
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The “Conmtinue” Mystery: How AI Knows What You Mean When You Can’t Spell
We’ve all been there. You are deep in a flow state, chatting with an AI like Claude or ChatGPT. You are typing furiously, trying to get a…
Claude Code Team Agents + Team Lead sind der absolute Hammer! Ich nutze die Team-Agents in der Claude Code Beta jetzt seit einem Monat intensiv für nestfainder.ai und ich denke, dass ist aktuell… | Hagen Hübel | 14 Kommentare
Global mobility is not just a trend; it is the future. Driven by economic shifts, climate change, and political landscapes, more people than ever are looking for a new place to call home. Being deeply rooted in the expat community myself, I have seen firsthand that finding that place isn
Ask an LLM about your relationship. It'll say break up. It's not wrong. Reddit's relationship advice in one stat: nearly 50% of all recommendations are just "leave." u/GeorgeDaGreat123 analyzed 15… | Hagen Hübel | 21 comments