Sebastian Gębski - Principal Solutions Architect at Amazon Web Services. ex-CTO, ex-VP/Eng. He has co-built online platforms since 2001: across all kinds of organizations - starting with startups and ending with international financial groups, on 3 continents. He was designing solutions for development factories up to 300 people and leading engineering organizations up to 70 people. Hyper-active blogger, co-host of CTO Morning Coffee and a serial reader. Fan of deliberate system design, System's Theory and practical applications of DSLs.