My Name is Franz Geffke - I was born and raised in East Germany but today my home is anywhere between Europe, the Middle-East and Southeast-Asia. New experiences and culture draw me to travel to, and live in different countries all around the world - With stronger foreign ties come a different, new perspective on all aspects of life and business which I continue to embrace.
Apart from my travels, I’m a privacy advocate and supporter of technologies and ideas that help promote personal freedom, decentralize certain aspects of power, and are easily accessible to everyone - now or in the near future.
Whenever I’m not working, I like to disconnect and return a different era - with crackling vinyls, glowing amplifiers and tennis.
Here’s what I’m reading: Bookshelf
Work
Senior Identity Engineer at TWIN (IOTA Foundation). 12+ years building production systems across identity, crypto, IoT, and real estate — sometimes as the founder.
My current focus:
- Digital Identity: OID4VP, SD-JWT VC, W3C VCs, KERI/vLEI, OIDC/CIBA, OAuth 2.0
- Backend Systems: TypeScript (Fastify, NestJS), Rust (Actix Web)
- Blockchain: Smart contracts (Move, Solidity), NFT marketplaces with KYC, crypto exchanges
- IoT: Patient monitoring, BLE/WebRTC, real-time gateways
I focus on solutions that solve concrete problems and create lasting value — using technology as a tool, not an end in itself.
Checkout my resume for more details on my work experience and skills.
