The following are talks that I've given or presented at various events, meetups or conferences:
Railsconf 2017: Built to last: A domain-driven approach to beautiful systems
In which I discuss the application of DDD techniques to break up a Rails monolith.
Fog City Ruby (Feb 2017): Highly Cohesive, Loosely Coupled (& Very Awesome)
A discussion on how to design systems that are loosely coupled and highly cohesive.
js.la (Feb 2016): Reactive Programming for Couch Potatoes
A gentle primer to reactive programming by way of RxJS and CycleJS.
Carbon Five Talk Night (Oct 2015): DDD-rail Your Monorail
A community talk around applying DDD principles to Rails
Other talks (of no less import!) are on my Speakerdeck profile: https://speakerdeck.com/andrewhao