Paolo Perrotta is the author of "Programming Machine Learning" and "Metaprogramming Ruby". He has hundreds of articles, conference speeches and training deliveries under his belt. He developed software in domains ranging from automotive to healthcare, large-scale web sites, and computer games.

Raphael Alampay is the co-founder of Cloudband Solutions Co., a software development and consultancy company that caters to custom based software for SME around the globe. Using time and tested technology such as Java, Ruby on Rails, Python, PostgreSQL and Linux, he has a passion for creating applications that solve real world problems making businesses more efficient and innovative at the same time. His craft in software is largely based on the philosophy of "kaizen" which means continuous impr... moreovement; that any piece of software is meant to be continuously improved over time. Aside from software development, Raphael also teaches computer science in universities and corporate entities largely in the field of programming and machine learning. He currently holds a master's degree in Computer Science and is working on his PhD in Computer Science as well. If not programming or teaching, Raphael enjoys playing the piano and guitar in his spare time.

Prateek is a software engineer that has been working on designing, developing, and testing enterprise as well as customer facing applications for companies like Zoom, Sun Microsystems, Oracle, and eBay. His interests include architecture, distributed systems, and security. He is passionate about technology and how it can help make learning fun, engaging, and widely accessible.

Alex Korban is an author and independent consultant with an interest in functional programming, databases, and geospatial applications. He's written several books about C++11 and C++14. Alex co-founded a company to visualize geospatial data for the heavy construction industry in order to improve safety and productivity when building highways, tunnels, and other infrastructure. Prior to that he worked on a wide range of software, such as early mobile applications, a flight simulator, and GPS-base... mored vehicle fleet tracking and guidance software for construction machinery, including bulldozers, excavators, and self-driving kerb laying machines.

Software development consultant, specialising in software architecture, Agile development methodologies and using the cloud as your software development platform alongside your on-premise infrastructure.