Marten Deinum is a Java/software consultant working for Conspect. He has developed and architected software, primarily in Java, for small and large companies. He is an enthusiastic open source user and a longtime fan, user, and advocate of the Spring Framework. He has held a number of positions, including that of a software engineer, development lead, coach, and a Java and Spring trainer. He has also authored the book Pro Spring MVC: with Web Flow, published by APress.

When not working or answering questions on StackOverflow, he can be found in water, training for triathlons or under the water, diving or guiding other people around.

Xinyu Liu graduated from George Washington University, Washington, D.C. He has worked for healthcare companies, a state government agency, and a leading e-commerce company with over 12 years' intensive application design and development experience. During his years of service, new application design and implementation methodologies and strategies were established due to his efforts. His skills cover broad domains such as web development, enterprise application integration, and big data analytics. He writes for Java.net, Javaworld.com, IBM developerWorks, and developer.com on a variety of topics, including web technologies, web security, persistence technologies, rule engine, and big data. In addition, he worked on the review of the books Spring Web Flow 2 Web Development, Grails 1.1 Web Application Development, and Application Development for IBM WebSphere Process Server 7 and Enterprise Service Bus 7, all published by Packt Publishing.

Luca Masini is a senior software engineer and architect, born as a game developer for Commodore 64 (Football Manager) and Commodore Amiga (Ken il guerriero). He soon converted to object-oriented programming and was attracted by the Java language since its early days in 1995.

He worked on this passion for Java as a consultant for major Italian banks, developing and integrating the main software projects for which he has often taken the technical leadership. He made them adopt Java Enterprise in environments where COBOL was the flagship platform, converting them from mainframe-centric to distributed.

He then shifted his focus toward open source, starting with Linux and then enterprise frameworks with which he was able to introduce concepts such as IoC, ORM, and MVC with low impact. He was an early adopter of Spring, Hibernate, Struts, and a whole host of other technologies that gave his customers a technological advantage and therefore development cost cuts in the long run.

After introducing these new technologies, he decided that it was time for the simplification and standardization of development with Java EE. So, he's now working in the ICT department of a large Italian company where he introduced build tools (Maven and Continuous Integration), archetypes of project, and Agile development with plain standards.

Now, his attention is focused on "mobilizing" the enterprise and he is working on a whole set of standard and development processes to introduce mobile concepts and applications for sales force and management.

He has worked on the following books by Packt Publishing: