I also attended a conf on jwt that was really nice. That was a very good overview of the features of that standard and possible attacks. Obviously recycled material from devoxx, but this is not an issue. Wish we could have asked some questions though.
Another conference was on API architecture. Generalities, not really usable as is. I felt sorry for the presenter as there was technical issues (for some reason, we had sound of another room in our speakers, wtf). There was still some takeouts