A programmer with over 14 years of professional experience, solution architect, team coach and trainer in agile processes and practices. Frequent speaker on Java and Agile conferences. Co-creator of Agile Warsaw group. Author of tumbler-glass, a BDD framework for Java and JUnitParams library. Over 7 years of day-to-day TDD. For over 4 years owns a software company in Warsaw called Pragmatists, this way he’s realising and proving true what he teaches.