David Koelle is a Principal Software Engineer at Charles River Analytics Inc. in Cambridge, Massachusetts, where he has employed XMPP on projects to facilitate collaboration and shared situational awareness among distant teams. David is also the author of JFugue, a popular open source music programming API for Java and other JVM languages, and he is a co-organizer for the Boston Android Meetup. David has delivered several award-winning talks at high-profile conferences including JavaOne and SXSW. In addition to his technical work in software engineering and systems engineering, he finds opportunities to mentor engineers to help them grow in their careers and recognize the value that proactive leadership can bring to engineers and their environments. David is a graduate of Worcester Polytechnic Institute (WPI).