Julian Sareyka has several years experience as a software developer (Java/C#). He worked as a team lead and technical project manager before he was introduced to Scrum by his colleague Florian Hawlitzek. He then worked as a Product Owner for 1 year. Since 2009 he works for a major German broadcaster as a freelancer. There he supported Product Owners, Scrum Masters and Team members with coaching Scrum and TDD.