Pradyumna Doddala is a passionate technologist and entrepreneur; he is the CEO of Kronch IT and has been an advisor for a couple of technological startups. Pradyumna has focused on different domains, such as augmented reality, life sciences, location-based marketing, and crowdsourcing solutions. He wrote several open source libraries and blog posts to assist his fellow developers. Pradyumna is also a musician and likes to spend his spare time creating music on his guitar.

He is currently working on Mastering Android UI Development, Packt Publishing.

Pavel Goodanets is a programmer, writer, and game designer from Latvia. He loves point-and-click adventures, games with strong narratives, and experimental forms of gameplay. Pavel speaks Russian and English. His website is http://pavel-insight.com and you can contact him at <[email protected]>.

Marc Estruch Tena has completed his BS degree in Multimedia Engineering with honors from La Salle—Ramon LLull University, Barcelona, Spain, in 2012. Since then, he has been employed as a research associate at the Human Sensing Laboratory in the Robotics Institute of Carnegie Mellon University, Pittsburgh, PA, USA.

As a member of this research laboratory, he has developed several applications and games for web and mobile platforms using Computer Vision algorithms that feature the IntraFace (http://humansensing.cs.cmu.edu/intraface) software for facial image analysis. His interest in Human-computer Interaction and his programming and design skills have led him to pursue new ways of user interaction with different tools and frameworks.

Jialong Zhai pursued a post-graduate degree in Computer Science from Xidian University. He has lots of experience in mobile and web games development and is good at C++ and JavaScript. Currently, Jialong works for the Cocos engine team, bringing free open source game engines to people.