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.
- SC5 pays salaries in Bitcoin, SC5 Blog, 15 March 2013
- Finnish software firm offers to pay part of staff’s salary in virtual Bitcoin currency, The Next Web, 15 March 2013