About the Reviewers

Petri Kainulainen is a software developer who lives in Tampere, Finland. He specializes in application development with the Java programming language and the Spring framework.

Petri has 15 years of experience in software development, and during his career, he has participated in the development projects of Finland's leading online market places as a software architect. He is currently working at Vincit Oy as a passionate architect.

Petri is the author of Spring Data, Packt Publishing, which was published in 2012, and writes regularly on his blog at http://www.petrikainulainen.net/blog/.

Micha? Kozik is an enthusiastic freelance developer. He has gained broad experience in Java while working for companies in the e-commerce, telecommunication, and government sectors. Micha? is always looking for new technologies to help him meet the challenges of customers. He enjoys sports and spending time with his family.

Pavithra Gunasekara is a programmer, blogger, and keen enthusiast of big data and data science. She received her Bachelor's degree in Computer Science from the University of Colombo. She has worked as a software engineer at a leading IT company in Sri Lanka and has hands-on experience in Java, R, Python, and Hadoop. Being a huge fan of Massive Open Online Courses(MOOC), she currently follows the data science specialization course provided by Coursera to extend her knowledge of data science. She regularly writes technical content on her blog at http://blog.eviac.net.

Sagara Gunathunga is a long-term contributor to Apache Software Foundation and a PMC member of Apache Axis and Apache Web Services projects. He actively contributes to Apache Axis2, Apache Web Services, and Apache Synapse projects. He currently serves as the Vice President of the Apache Web Services project.

In his day job, he works for WSO2, where he previously led the WSO2 Application Server project and now leads the WSO2 Governance Registry project. Sagara has more than 8 years of industry experience in Java EE, Spring, Web Service, API management, and enterprise-integration-related technologies. Sagara holds a degree in Computer Science from the University of Peradeniya, Sri Lanka and also holds a Bachelor's degree in Information Technology from University of Colombo School of Computing.

Sagara usually writes his technical expertise on his blog at http://ssagara.blogspot.com/.

Bhavani P Polimetla has been learning and working in IT Industry since 1990. He graduated with Bachelor of Computer Science and Master of Computer Applications degrees from Andhra University, India. He worked on standalone Swing applications on Grid computing and Multitier Architecture. He has worked with clients that include three fortune 50 companies. At present, he is working as a software architect at Mountain View, California, USA.

To demonstrate his skills he has completed, more than 25 Certifications in the spectrum of Java, database, project management, and architecture subjects. He has also received awards for many of his projects. He likes to spend his free time doing social service activities. More information is available on his website at www.polimetla.com.