Josh Long, Spring Developer Advocate at Pivotal and Java Champion, is a lead author, or co-author, on five books on Spring for Apress and O'Reilly, a frequent speaker at conferences worldwide, a JavaOne rockstar, and also the instructor on three Spring LiveLessons videos. He is a contributor to various Spring projects (including Spring Boot) and an all-around Spring fan. When he’s not hacking on code for SpringSource, he can be found at the local Java User Group or the local coffee shop. Josh likes solutions that push the boundaries of the technologies that enable them. His interests include scalability, BPM, grid processing, mobile computing, and so-called "smart" systems. He blogs at spring.io/blog or joshlong.com. You can follow Josh on Twitter @starbuxman.
Marcin Grzejszczak is a software engineer at Pivotal. He has written two books, Mockito Instant and Mockito Cookbook. Marcin is co-founder of the Warsaw Groovy User Group. Currently he is working as lead of the Spring Cloud Sleuth, Spring Cloud Contract, and Spring Cloud Pipelines projects. You can follow Marcin on Twitter @mgrzejszczak.