IceFrog

Icefrog is currently hired by Valve and is the current lead developer of Dota 2 as well as the original current DotA map, his involvement in the dota series began when he inherited DotA-Allstars from Steve Feak in 2005, since then he became well known for his highly-meticulous balancing, as well as for staying anonymous and to this date never publicly revealing his real name.