It appears very interesting, I wish I could attend. It seems like plenty of material for a short talk though. How much time will you have?
I don't know how you plan to cover Hapi.js and Mongoose, but please bear in mind that most Android developers aren't full stack devs.
The majority wouldn't probably have any backend experience to speak of. So my advice would be to make sure not to lose your audience at this point, especially since it will have to be a rather highly paced talk