MongoDB at OSCON 2014 presented at the 16th annual O'Reilly Open Source Convention in Portland, Oregon. The event drew over 4,000 open source enthusiasts and featured presentations from MongoDB engineers on various topics such as async programming, rapid prototyping with Java and MongoDB, and introduction to AngularJS. These tech behemoths have invested millions into creating and maintaining open source software for internal and external use, discovering that it promotes better quality development through transparency and encourages employee retention. The event also offered a free trip to Dublin for a MongoDB training in September, which was awarded to Thothathri Srinivasan, a Software Engineer at Groupon's office in Mountain View.