Open source contributor (including Rest-assured, Moco, Mockito). Co-author of the Groovy @Builder AST, Micro Infra Spring and Accurest projects. Author of Uptodate Gradle plugin, Spock Subjects-Collaborators Extension, Gradle-Test-Profiler and JSONAssert open source projects. Co-founder of the Warsaw Groovy User Group and Warsaw Cloud Native Group. Author of Mockito books. Making Spring Cloud @Pivotal.