Balaji Varanasi is a software development manager and technology entrepreneur. He has over 13 years of experience architecting and developing Java/.NET applications and, more recently, iPhone apps. During this period, he has worked in the areas of security, web accessibility, search, and enterprise portals. He has a master's degree in computer science and serves as adjunct faculty, teaching programming and information system courses. When not programming, he enjoys spending time with his lovely wife in Salt Lake City, Utah.Andres Sacco has been working as a developer since 2007 in different languages, including Java, PHP, Node.js, Scala, and Kotlin. His background is mostly in Java and the libraries or frameworks associated with this language. At most of the companies he worked for, he researched new technologies to improve the performance, stability, and quality of the applications of each company. In 2017, he started to find new ways to optimizethe transference of data between applications to reduce the cost of infrastructure. He suggested some actions, some applicable in all of the manual microservices and others in just a few. All of this work includes creating a series of theoric-practical projects (available on Manning.com). Recently, he co-authored an Apress book on Beginning Scala 3. He also, published a set of theoric-practical projects about uncommon ways of testing, such as architecture tests and chaos engineering.