Kamalmeet Singh got his first taste of programming at the age of 15, and he immediately fell in love with it. After spending over 14 years in the IT industry, Kamal has matured into an ace developer and a technical architect. He is also the co-author of a book on design patterns and best practices in Java. The technologies he works with range from cloud computing, machine learning, augmented reality, and serverless applications to microservices and more.

Mert Çalışkan is a coder living in Ankara, Turkey. He has over 10 years experience in software development in the architectural design of enterprise Java applications. He is an open source advocate for software projects such as PrimeFaces, and has also contributed to and been the founder of various others. Currently, he also works as a consultant for Payara Application Server. He is a co-author of PrimeFaces Cookbook, by Packt Publishing, and a co-author of Beginning Spring, by Wiley Publications. He is an occasional author for Oracle Java Magazine. He is the founder of AnkaraJUG, which is the most active JUG in Turkey. In 2014, he was recognized as a Java Champion for his achievements. He is a part-time lecturer at Hacettepe University on enterprise web application architectures and web Services. He shares his knowledge at national and international conferences, including JavaOne 2016, JDays 2015, JavaOne 2013, JDC 2010, and JSFDays'08. You can reach Mert via his Twitter handle: @mertcal.

Ondrej Mihályi is a software developer and consultant specializing in combining standard and proven tools to solve new and challenging problems. He's been developing in Java and Java EE for 9 years. He currently works as a support engineer and a developer advocate for Payara Services Ltd. As a scrum master and experienced Java EE developer, he also helps companies build and educate their development teams. He loves working with the Java EE community and is a contributor to a number of open source projects in the Java EE ecosystem, including Payara Server and Eclipse MicroProfile. He's a co-leader of the Czech Java user group and talks at international conferences such as JavaOne, Devoxx, GeeCon, and JPrime.

Pavel Pscheidl is a man of many interests. He works as a researcher in the faculty of informatics at the University of Hradec Králové. Pavel, with his focus on statistics and agent-based simulations, currently specializes in smart systems and highly parallel simulations. In addition, he is usually to be found developing for various big companies as a consultant. Pavel enjoys the beauty and simplicity of Java EE in many projects on a daily basis and does his best to pass on his knowledge by teaching students, attending conferences, and giving talks. He is also a passionate blogger and Java EE article writer.