For this talk, I spoke on how Rails works internally by going on a code journey from Rack to the Rails boot sequence, Rack and Rails middlewares, Rails engines, ActionDispatch routing, ActionController rendering, and Railties.
The slides are embedded on my talks page, along with the rest of the speaking archive.
Audience at DevMeetup
Pictures from the event: https://www.facebook.com/media/set/?set=a.713651765349745.1073741847.227925640589029&type=1
Event page: https://plus.google.com/events/cr78vpsi1466vv0ldj990fdgdr8