Ricky Yim is a passionate software engineer who has over 17 years of industry experience. Ricky is a firm believer in building quality software and using agile practices to solve problems. He takes a flexible approach to software delivery and applies innovative solutions. He is currently the head of technology and delivery at DiUS Computing.

Tejaswini Mandar Jog is a passionate and enthusiastic Java trainer. She has more than 9 years of experience in the IT training field, specializing in Java, J2EE, Spring, and relevant technologies. She has worked with many renowned corporate companies on training and skill enhancement programs. She is also involved in the development of projects using Java, Spring, and Hibernate. She has written three books. In her first book, Learning Modular Java Programming, the reader explores the power of modular programming to build applications with Java and Spring. Her second book, Learning Spring 5.0, explores building an application using the Spring 5.0 Framework with the latest modules, such as WebFlux for dealing with reactive programming. Her recent book, Reactive Programming with Java 9, explains how to build robust, asynchronous, and event-driven applications with ease.