Architecture the Lost Years - Robert C. Martin - 1h06min
Uncle Bob discusses how an application should be structured in order ton convey information about its purpose
Nothing is something - Sandy Metz - 36min
ifs at the boundary of your code, making it simpler. Why composition is way better than inheritance. NullPattern is the shit. This is in that conf.
CQRS and Event Sourcing - Greg Young - 1h04min
A cool introduction on CQRS pattern and Event Sourcing.