Event-Driven Architecture

Decoupling systems via events: message brokers, streaming pipelines, event sourcing, and backpressure.

Message queues	Kafka, NATS, RabbitMQ — delivery semantics, ordering guarantees
Event sourcing	Log-as-truth, event replay, projections
Backpressure	Preventing producer overrun — bounded channels, rate limiting
Actor model	Isolated state, message passing, supervision trees