Slim Ouertani is solution architect, InfoQ-Fr editor, Big Data Science, Cloud and SOA certified trainer, founder and organizer of Riyadh IT Architecture Meetup. After his engineer degree in computer science, Slim spent over than 12 years in multinational companies such as Orange, Sagem and STMicroelectronics as architect, international agile coach and Head of IT development department. He’s broad certified as in addition to his SOA, Cloud, Big Data certifications: Trainer , Architect, Professional & Engineer. Slim holds multiple certifications including Togaf 9, Archimate 2, IT4IT, PMP, ITIL, CMMi, Mongo, Spring, JAVA, SCALA and reactive programming. • Trained as an architect, Slim specializes in enterprise Java development, functional programming focusing on highly scalable applications and now expanding his experience to big data and cloud computing. • Slim enjoys open source and regularly contributes to InfoQ-FR community where he is the author of many articles and news.