Sebastian is an experienced and dedicated software engineer specializing in object-oriented design and programming, software architecture, code quality and agile. His main interest is practical usage of refactoring, testing and software development techniques combined with existing code, both on class and application level. He’s also a speaker (JDD, GeeCon, Confitura, Devoxx, etc.), blogger (Let’s talk about Java, DZone, JavaCodeGeeks) and trainer and consultant at Sages.