Alexis Hassler lives in Beaujolais, France but, unlike his neighbors, he isn't a winemaker. He's a freelance software developer and trainer (http://www.sewatech.fr). Apart from his main activities, he cofounded the Java User Group of Lyon (http://www.lyonjug.org) and assists the organization of the Mix-IT conference (http://mix-it.fr).

Michael S. Jo is a technical architect with 14 years of enterprise Java web application development experience. Michael is an enthusiast of new technology and a lifelong learner. Currently, he works at Fujitsu Canada as an application architect. He likes to learn and share his experience through his blog at http://mjtoolbox.wordpress.com.

Jan Kalina is student of informatics in the Faculty of Information Technology, Brno University of Technology. He got familiarized with WildFly on the occasion of writing his bachelor thesis, the result of which was a subsystem of WildFly that allows the deployment of Java security policies on a WildFly domain. On the basis of this, while reviewing this book, he was recruited as a developer of WildFly Elytron at Red Hat.