About the Reviewers

Koji Hasegawa is an iOS/Android app developer, living in Japan. He released various applications to the AppStore, such as "Den-Ace quiz, Minoru Kawasaki's tokusatsu movies world", and "Futsal rules and trivia".

In addition, he is also involved in community activities related to test automation. Koji has authored a few books on testing and test automation in Japanese.

He is an ISTQB Certification Tester and is also certified in Iaido (Japanese Sword Arts) and Kyudo (Japanese Archery).

Raimon Ràfols has been developing for mobile devices since 2004. He has experience in developing on several technologies specializing in the UI, build systems, and client-server communications. He is currently working as an engineering manager at AXA Group Solutions in Barcelona. In the past, he worked for Imagination Technologies near London and Service2Media in the Netherlands. In his spare time, he enjoys programming, photography, and giving talks on Android performance optimization and Android custom views at mobile conferences.

Ali Utku Selen is a system engineer at Sony Mobile Communications, working on flagship Android devices for more than 5 years. He started programming at the age of 11, and since then has had a great interest in software development. He also holds an MSc degree from Dokuz Eylül University, Computer Engineering Department.