Javier Fernandez is a software architect with almost 15 years experience with Java technologies. He has worked as a teacher, researcher, programmer, analyst, writer and now as an architect in all types of projects related to Java, especially J2EE. As a teacher, has taught over 1000 hours of training in basic Java, J2EE and Struts framework. As a researcher, has worked in the field of information retrieval developing applications for processing large amounts of data in Java and has participated as co-author on several journal articles and conference presentations. In recent years, has worked on developing J2EE web applications for various clients from different sectors (public administration, insurance, healthcare, transportation, ...). Currently he works as a software architect at Capgemini developing and maintaining applications for an insurance company. He is the author of the book Java 7 Concurrency Cookbook.