Lefteris Karapetsas is a long-time Ethereum contributor and founder of rotki, the open-source, self-hosted portfolio management and accounting app that gives users true ownership of their financial data. Before creating rotki, he was a core developer on the Ethereum C++ client, a contributor to Solidity, and lead developer of the Raiden Network, Ethereum’s original layer-2 payment channel system.

With over a decade in crypto, Lefteris has been a vocal advocate for privacy, transparency, and user sovereignty in software. His talks explore the economics and engineering of building aligned, privacy-preserving applications that resist surveillance and platform capture.