Daniel Nagy's longstanding interest in cryptocurrencies was initially purely academic: reading and publishing papers on the topic, participating in conferences and teaching cryptography at ELTE Budapest University of Sciences. While somewhat active in the Bitcoin community beginning with 2010, his involvement in the industry became full-time with joining Ethereum in 2014, after the token sale, but before the genesis block. His most widely used contribution is ERC-681, the standard for encoding Ethereum transaction requests in URLs and QR-codes. His project, Swarm -- the decentralized storage layer for Ethereum -- became a separate project in 2020, of which he was vice president until 2023. Since resigning from Swarm, he has been involved in various DeFi projects of smaller scope, in advisory roles and as an investor.