I'm a product engineer and founder, shipping software since 1999. My work spans consumer apps, ad-tech, blockchain infrastructure, and fintech.In Berlin, I founded proud magazine, an independent socio-political publication recognized by the DFJV and archived in the German National Library. I co-founded abend.net, an ML-driven ad optimization platform, and abend.com, a Facebook Events discovery app — together serving thousands of paying clients monthly.As COO and CPO of æternity Blockchain, I led product and operations, scaled the team to over 100 people, and contributed to Liechtenstein's Blockchain Act. I then served as Chief Product Officer at Börse Stuttgart Digital Exchange, leading product for one of Europe's first regulated crypto trading platforms.I've been in Bitcoin since 2012 — early mining, Room 77, and contributing to different Open Source projects.Now I'm building nuri.com. I acquired the Nuri brand after its insolvency, rebuilt the product from scratch, and launched a passkey-secured self-custodial Bitcoin wallet with non-custodial Visa card and integrated banking — live on iOS and Android across 32 EU countries.

Emin Mahrt, Vaduz, Liechtenstein.