About the authors

Stephen Samuel is an accomplished developer with over 17 years of experience. He has worked with Java throughout his career, and in the past five years has focused on Scala. He has a passion for concurrency and big data technologies. Having spent the last few years in investment banking, he is currently working with Kotlin on a major big data investment project. Stephen is also active in the open source community, being the author of several high-profile Scala and Kotlin libraries

Stefan Bocutiu is a big data consultant with over 13 years of experience in software development. He enjoys coding in Scala and C#, and has a passion for stream processing technologies. With the team at DataMountaineer, he focuses on providing scalable, unified, real-time data pipelines to allow reactive decision making, analytics, and Hadoop integration. 

Stefan is passionate about motorsports, and while his racing skills are not good enough to allow him to compete, he tries to attend as many MotoGP races as possible. When he is not coding, he can be found at the climbing wall or at the gym. Occasionally, hiking and scrambling trips are on his calendar, and during the winter season, skiing trips are a must for him.