Vlad Mettler is a seasoned software developer and Chief Architect at GroupM with a passion for creating processes that encourage software quality. He has a diverse range of experience, from owning software development companies like Liquid Ant and PixelDesign.pl to working as a Python Developer at TBG Digital and media planner at Signum .s.c. Vlad's current interests include Executable Specification, Acceptance Test Driven Development, and hexagonal architecture. He has also been involved with microservices, business analysis and measurement, and software development practices like continuous delivery and specification workshops. Vlad holds an MBA in Marketing from Uniwersytet Ekonomiczny w Poznaniu and a degree in Economics from Télécom SudParis.