Producer and DJ. Started his career in 1982. Having studied music in school, set up a small MIDI studio in 1986. In the narrow dance music scene at the time in Stockholm, news got to SweMix about JJ and in 1987 he and [[artist:René Hedemyr]] hooked up as the production team [[artist:The Real Dynamic Duo]]. They also established Stockholm's first house night called 'Batclub 1988'.