Sirius, a.k.a. Martti Malmi, was the second Bitcoin developer after Satoshi and the founder of the Bitcoin Forum. He's not an active developer anymore, but continues to manage the domain names bitcointalk.org and bitcoin.org.
His current employer SC5, a Finnish HTML5 development agency, pays salaries and accepts payments in bitcoins.
- SC5’er Intro: The Bitcoin Guy
- Onko hän tulevaisuuden Linus Torvalds? (News article in Finnish)
- Bitcoin 0.2 release note