I'm an engineering leader and a mobile engineering expert. My passion is building great ideas with smart people, and delivering thought-leading, massive scale apps that impact millions of people. I enjoy working on things that customers love, value, and use everyday. The Groupon mobile apps pull in more than half of Groupon's purchases and billions in annual bookings. They have received Best of 2014 awards from Apple and Google, Best Internet Retailer Award of 2015 for Groupon's Mobile app, and were listed as Forrester Research's top app for "Who Does Mobile Commerce Well?" in November 2014. The apps have a 4.5 star rating and are Top 5 in their app store categories.Prior to coming to Groupon, I also built the Digg, TripIt, and OpenTable apps. I'm in the top 10% of contributors for the Android and Java tags on Stack Overflow. I've flown a project on the Space Shuttle. I'm the author of Android App Development for Dummies. I've ridden my motorcycle from Alaska to Mexico, and I believe in taking calculated risks while being biased toward action.I'm passionate about executing on technical, cultural/organization, and product forming challenges. I've been at Groupon for an amazing several years, where I am the Director of Mobile Engineering leading a team of about 50 developers across distributed locations. I care a lot about the culture and spirit of my teams and want them to be able to change the world, and I believe that great leadership means sometimes nurturing disruption within your own team. I've witnessed the value of community and giving back. I've spoken on Android development at conferences in London, Boston, Silicon Valley, Rio and Romania. You may be interested in RoboGuice, my open-sourced Android framework used by Starbucks, Nike, Microsoft, and thousands of others.