Reactive DDD: Floor to Ceiling, or Ceiling to Floor?

Networking and other fun begins at 6:00pm, and the presentation will start at 6:30pm-ish.

Presentation Summary:
Are Reactive systems developed top-down, or bottom-up? Does it matter? The question is, what is the top and what is the bottom? Reactive DDD is pervasive throughout the system, so maybe it's Reactive Through-and-Through. Well, you'll find out soon enough.