|University of Quebec (ETS), DESS|
|University of Amsterdam, MA|
|McGill University, BA|
Joost studied Media Theory at McGill (BA) and the University of Amsterdam (MA), and later Software Engineering (DESS) at the University of Quebec. At Expedia for 5 years, he worked his way through the Development organization, from Programmer to Architect to Product Manager. He co-founded Hopper with Frederic Lalonde in 2007.