Martti Malmi

CEO ∙ Sirius Business Ltd

First developer of Bitcoin after Satoshi in 2009, founder of bitcointalk.org and former maintainer of bitcoin.org. Made the first known BTC-USD transaction in 2009, selling 5,050 BTC for $5 on PayPal. Ran bitcoinexchange.com for a while in 2010. Currently working on Iris, a decentralized social networking application on the Nostr protocol. Iris, like many Nostr clients, supports tipping of posts and users with Lightning.