Decoupling complex business logic using Pub/Sub patterns. I ensure heavy background tasks don't slow down the user experience.
Identifying domain events (e.g., 'UserSignedUp', 'PaymentReceived') and their side effects.
Setting up message brokers (Redis/RabbitMQ) to handle event distribution.
Writing isolated listeners that handle specific tasks without blocking the main thread.
Implementing Dead Letter Queues (DLQ) and retry mechanisms for robust processing.
Speed is a feature. By moving heavy tasks to the background, I ensure your API responds in milliseconds, not seconds. This architecture also makes your system easier to maintain and extend without regression.