Julien joined the Swiss Data Science Center in January 2017, after he got his PhD degree, as well as his Master degree with an Excellence Fellowship, from EPFL's school of Computer and Communication Sciences. In parallel, he is one of the co-founder of Arcanite Solutions, a growing consulting company, with some former PhD fellows and friends. During his PhD he had the chance to work at the Nokia Research Center, located on EPFL's campus, on context awareness in mobile devices. He also spent half a year at Nestlé/Nespresso designing and setting up the infrastructure for centrally managing the development of mobile applications for all Nestlé's subsidiary brands.