Jan is the cofounder and CEO of WhatsApp, a communication service that he cofounded in 2009. He is responsible for setting the overall direction and strategy for WhatsApp. Together with his cofounder Brian Acton, Jan is also responsible for the design and interface of WhatsApp's service and the development of its core technology and infrastructure. In 2014, Facebook bought WhatsApp for $19 billion and Jan joined Facebook’s board. Jan grew up in Ukraine before he immigrated to California in 1992, where he studied at and later dropped out of San Jose State University.