He joined Princeton after a postdoc at the Centre de Recerca Matematica in Barcelona, where he was working with Gabor Lugosi. He received his Ph.D. in mathematics from the University of Lille 1, advised by Remi Munos, after undergraduate studies at the Ecole Normale Superieure de Cachan. His research focuses on the mathematics of machine learning, with emphasis on problems related to multi-armed bandits. His work was recognized by several awards, such as the COLT 2009 best student paper award, and the Jacques Neveu prize 2010 for the best French Ph.D. in Probability/Statistics.