Jan Koum is an American internet inventor and computer programmer. He is the CEO and co-founder of WhatsApp, a mobile messaging application which was acquired by Facebook Inc. in February 2014 for US$19 billion.
Born: February 24, 1976 (age 41), Kiev, Ukraine
Nationality: American
Net worth: 9.7 billion USD (2017) Forbes
Education: San Jose State University (1994–1997)
Home town: Fastiv, Ukraine
Organization founded: WhatsApp Inc.