Guilherme Silveira works with Java for 10 years, mostly EE technologies and open sources counterparts. Head instructor at Caelum, a brazilian training company, technical editor for the brazilian java magazine "Mundo Java" and creator of Restfulie, co-founder of the most accessed and largest online portuguese-speaking java user group, guj.com.br. Currently focuses on aspects of good code and how to write maintainable software in Java, Scala and Ruby.
Adriano Almeida works with web development, several technologies and architectures. He is an open source developer commiting on Restfulie and VRaptor, teaching and developing at Caelum.
