Abid Khan is an application developer and test engineer with over 10 years of experience. He has worked with different programming languages, including C/C++ and Java, and is now working with Kotlin as a primary language for Android development. Abid is also the author of a book, Hands-On Object-Oriented Programming in Kotlin. He lives in Stockholm, Sweden, and spends most of his time reading books, learning new technologies, and blogging.

H. M. Mahedi Hasan Jisan is currently pursuing his master's degree in computer science at the University of Regina, Canada. He is working in the research field under the supervision of a professor. He completed his B.Sc. in computer science and engineering at BRAC University in 2017. He previously worked as a junior software engineer at Cramstack Ltd., from June 2017 to December 2018. Learn Spring for Android Application Development is the first book that he has worked on as a technical reviewer.