In my experience, developers get user experience, but they don't know how to do user experience. Often "feature creep" comes from developers (at least in my company) which features keep getting added on and on... "what if we did...". IMO, user experience is about pulling back some of those features and requirements to make a great solid app/product without a ton of ad-ons. So they'll be very, very interested to hear what you have to say. Defining what user experience is, tips on making it better, how user experience and developers can work smoothly together, why details matter (pride in craftsmanship), fast prototyping to get the UX better, basic design/ux skills for developers... These are a few ideas on what you could talk on.