Daniel Ek (born 21 February 1983) is a Swedish billionaire entrepreneur and technologist. He is the co-founder and CEO of music streaming service Spotify. Ek served in a senior role at Nordic auction company Tradera which was acquired by eBay in 2006. Ek also served as the CTO of the browser-based game and fashion community Stardoll. Ek later started another company Advertigo, an online advertising company. Advertigo was sold to TradeDoubler in 2006. After selling Advertigo, Ek briefly became the CEO of μTorrent, working with μTorrent founder Ludvig Strigeus. This ended when μTorrent was sold to BitTorrent on December 7, 2006. Strigeus would later join Ek as a Spotify developer. (Source: Wikipedia.org, CC BY-SA)