About the reviewers

Ehsun Behravesh is a senior software engineer employed by Atlassian. He fell in love with computer programming when he was 15. Ehsun is holding a master's degree in computer science, and he has worked as a software engineer in five countries.

Rivu Chakraborty is a speaker, author, community contributor, Google-certified Android developer, and Caster.io instructor. He has over seven years of professional experience, and is currently working as a senior software engineer (Android) at BYJU'S The Learning App. Rivu considers himself a Kotlin and Android enthusiast-cum-evangelist. He has been using Kotlin since December 2015. Rivu created the Kotlin Kolkata User Group, and before moving out to Bangalore, he had been the lead organizer for both the Kotlin Kolkata User Group and GDG Kolkata. Along with organizing events, he also speaks at local events and conferences all over India, including DroidJam India and DevFests. Rivu has authored multiple books on Kotlin and Android development.