Markus Junginger is an Android enthusiast and developer since the first SDK release in 2007. His mobile software company greenrobot focuses on high quality Android apps. As a side product, Markus created open source libraries, which are widely used by many popular apps. Markus has 15+ years experience with Java and did his first mobile software project in 2001. He regularly speaks and writes about Android, gives Android trainings, and develops for Android.