Whatsapp CEO Jan Koum spoke at the Mobile World Congress on Feb. 24, 2014 in Barcelona, Spain. (David Ramos/Getty Images) Jan Koum’s birthday was Feb. 24, but he received his big gift early. The Ukraine-born CEO and founder of WhatsApp has catapulted from relative unknown to a poster boy for rags-to-riches immigrant triumph since his rapidly growing messaging company was sold last month to Facebook for a record-breaking $19… Read more »
