Jos Dirksen has worked as a Software Developer and Architect for more than a decade. He has much experience in a large range of technologies ranging from backend technologies, such as Java and Scala, to frontend development using HTML5, CSS, and JavaScript. Besides working with these technologies, Jos also regularly speaks at conferences and likes to write about new and interesting technologies on his blog. He also likes to experiment with new technologies and see how they can best be used to create beautiful data visualizations, the results of which you can see on his blog at http://www.smartjava.org/. Jos is currently working as an Enterprise Architect for Malmberg, a large Dutch publisher of educational material. He is helping to create a new digital platform for the creation and publishing of educational content for primary, secondary, and vocational education. Previously, Jos has worked in many different roles in the private and public sectors, ranging from private companies such as Philips and ASML to organizations in the public sector, such as the Department of Defense. Besides his interest in frontend JavaScript and HTML5 technologies, he is also interested in backend service development using REST and traditional web service technologies. Jos has already written two books on this subject. He is the coauthor of the Open Source ESBs in action book that was published in 2008, and in 2012 he published a book on how to apply SOA Governance in a practical manner. This book is titled SOA Governance in Action.