Sherwin John Calleja Tragura started his career as a student assistant and a mathematics tutor during his college years at the University of the Philippines Los Baños, Laguna, Philippines. With meager resources, he graduated as a Department of Science and Technology (DOST) R.A. 7687 scholar under the bachelor of computer science degree. Immediately after graduation, he took up the offer to teach CMSC 150 (numerical and symbolic computation) at the Institute of Computer Science and completed his masters degree in computer science simultaneously. He became part of the International Rice Research Institute (IRRI) software team, which gave him the opportunity to use Struts, Spring, and RCP frameworks in many of its software projects.Based on his experience at IRRI, he was given the opportunity to work as a Java analyst in various companies in Manila, such as ABSI, PHILAM- AIG, and Ayala Systems and Technology Inc. (ASTI). These companies have strengthened his skillset through training in Java and Java Enterprise platforms and some popular tools such as EMC Documentum and Alfresco Document and Records Management System. He got his first career certification in the EMC Documentum Proven Associate course (E20-120).After a few years, he decided to become an independent consultant and trainer, providing services mostly on Java-based projects, Alfresco, and Apache OFBiz requirement. He started his venture as a Java-JEE Bootcamp with 77Global and is currently the trainer at Software Laboratory Inc. (SLI), Alibata Business and Technology Services Inc., and Nityo Infotech, Philippines. He also conducts training and talks around the Philippines such as in Cebu City and Tacloban City.Sherwin has contributed as a technical reviewer on various books by Packt Publishing, these include
