Hagen Hübel
Serial technical founder.
I turn ideas into companies. Not in theory — I've done it four times, each one starting alone. First customers, product-market fit, team, investors, exit. Then I do it again.
Between ventures I work with other founders — as a technical co-founder, advisor, or consulting partner. I bring the full cycle: building a product people actually want, growing the team that delivers it, and navigating the business decisions along the way.
“A good idea is worth nothing without a product. A product is worth nothing without customers. I build both.”
Starting from zero
Every venture I've built started alone — no team, no funding, no customers. I find the first users, validate the product, and prove the market before scaling anything.
Building the team
Once product-market fit is clear, I bring in the right people. I've built dev teams, marketing teams, and leadership layers — and I know the difference between hiring too early and too late.
Advisor & sparring partner
Between ventures I work with founders, investors, and acquirers. For founders I bring the full cycle — idea, product, team, growth. For investors and acquirers I do technical due diligence: assessing codebases, architecture, and engineering teams before a deal closes.
nestfainder.ai
Founded and built a multi-service location intelligence platform - Go microservices, Python/FastAPI, Flutter, PostGIS, pgvector, LLM-generated city narratives, TOPSIS scoring across 22 000+ cities worldwide.
infobud.ai - Fully Automated News Agent
Co-founded and led the engineering of an AI-driven news aggregator with automated content pipelines, NLP classification, RAG retrieval, and multilingual summarization at scale.
Blockchain & Web3 - Ethereum dApps & Tokenization
Built and led engineering for tokenization-as-a-service platforms serving 25+ institutional clients. Smart contracts, ERC-20/721/1155 tokens, DeFi infrastructure, and a full token lifecycle platform on Ethereum, Gnosis, Polygon, and Avalanche.
First React Native App - Zizzle eLearning
Shipped one of the early production React Native apps as CTO of Zizzle eLearning Inc. (Salt Lake City). Cross-platform iOS/Android app for Chinese language learning with subscription billing and audio content delivery.
Mobile Engineering - iOS Native
Started mobile engineering with native iOS development at Yatego, building the Yatego Local app with social media integration, Cloudinary, and Facebook APIs.
First Startup Funding - Medolan UG
Founded Medolan UG, an eHealth startup in Düsseldorf, and led the full software stack as CTO. First institutional startup funding received.
High-Performance Web Applications
Transitioned to web-scale engineering - building high-traffic marketplace backends, REST APIs, and e-commerce platforms. Later led the full restack of Yatego, one of Germany's largest online marketplaces.
MIS Software for the Print Industry
Developed a comprehensive Management Information System for the printing industry - covering CAD/CAM workflows, cost calculations, and CMS integration for production planning.
Dienstplanberechnung für Krankenhäuser
Shipped roster calculation software for hospital shift planning. First commercial customers: Klinikum Frankfurt (Oder) and Klinikum Strausberg.
First Software - Built & Sold at 15
Built and sold the first commercial software at 15: a video rental management system (Verwaltung für Videotheken), starting on a C64 with BASIC before moving to Assembler.
Have an idea worth building?
I'm open to co-founding, consulting, and advisory roles — for early-stage ventures and established companies alike. If you feel like nestfainder.ai is something you want to be part of in any shape or form, I'd love to hear from you.