About the reviewers

Ashok Kumar S has been working in the mobile development domain for about six years. In his early days, he was a JavaScript and Node developer. With his strong web development skills, he mastered web and mobile development. He is a Google-certified engineer, a speaker at global conferences, such as DroidCon Berlin and MODS, and he also runs a YouTube channel called AndroidABCD for Android developers. He also contributes heavily to open source to improve his e-karma.

He has written books on WearOS programming and the Firebase toolchain. Ashok has also reviewed books on mobile and web development, namely Mastering Junit5, Android Programming for Beginners, and Developing Enterprise Applications Using JavaScript.

Mitchell Wong Ho was born in Johannesburg, South Africa, where he completed his national diploma in electrical engineering. Mitchell's software development career started on embedded systems and then moved to Microsoft desktop/server applications.

Mitchell has been programming in Java since 2000 on J2ME, JEE, desktop, and Android applications, and has more recently been advocating Kotlin for Android.