With 10 years of experience in back-end development, software architecture and team management, Grégoire is a consultant but also a trainer and co-manager of the training organization "MasterClass" by Les-Tilleuls.coop. Contributor to many open source projects and writer of technical articles, he is the author of the book "Memex: la route du REST". He is also a speaker at national events. He teaches the development of API oriented applications through PHP at the University of Lille and at the Enigma school in Lille.