Kristian Kostal is leader of the Blockchain & FinTech research group at Faculty of Informatics, Slovak University of Technology in Bratislava. He is a Slovak representative in the European Blockchain Partnership (European Commission). He is very active in research-driven development, worked as an advisor to crypto companies, developed a full cryptocurrency network backed with gold, did at least 10 audits of smart contracts in Ethereum, and developed several contracts in Ethereum, Solana, and Polkadot. He was among the first in Slovakia to play with Colored Coins in Bitcoin. Besides his expertise in blockchain interoperability, you can talk with him about anything Ethereum and Bitcoin related, but according to his Rust experience, he can be a good chit-chat also for Polkadot and Solana.