I joined JBoss in February '12. I'm currently working on two projects: CapeDwarf (JBoss' open-source implementation of the Google AppEngine API) and Weld (the reference implementation of CDI); occasionally I also contribute to Infinispan. I actually took my first programming steps when I was 6 years old and have been a nerd ever since :). For the last 12+ years, I've mostly been programming in Java.
JBoss CapeDwarf is an implementation of the Google App Engine API, which allows applications written for the Google AppEngine to be deployed on JBoss Application Servers without modification. Behind the scenes, CapeDwarf uses existing JBoss APIs such as Infinispan, JGroups, PicketLink, HornetQ and others.
Inside CapeDwarf is a series of blog posts about the internals of the CapeDwarf project. CapeDwarf is an open-source implementation of Google AppEngine APIs on top of various JBoss technologies. You'll find more info on CapeDwarf at the project's page at http://www.jboss.org/capedwarf