SIONG is the co-founder of Jupiter. SIONG graduated from the University of Illinois at Urbana-Champaign (UIUC) with a degree in computer science. He founded GraffitiGeo in his freshman year. GraffitiGeo was funded by Y Combinator and later sold to Loopt. SIONG then worked on early product development at Envoy, which was funded by Andreessen Horowitz.