Jonathan Weiß (nee Rass) was born in 1984 in Münster (Westfalen). He is an IT application specialist currently living in Offenburg. He is working as a Core Developer on the open source JavaScript framework qooxdoo for 1&1 Internet AG in Karlsruhe. In 1998 he started his career working for a start-up called genix, which later became Beloy at Lycos Europe. Since then he has been focusing on web technology, particularly on developing web applications with open source technology.