Shekhar Gulati is a seasoned Java programmer with more than 11 years of Java software development experience. He is also a public speaker and technology blogger. He is the author of the OpenShift Cookbook, published in October 2014. Rahul Sharma is a seasoned Java developer with over 11 years of industry experience. He is an open-source enthusiast and has worked on various projects such as Apache Crunch and HDT. He is the author of NGINX High Performance, published in July 2015.