queue-based async processing

Decouple microservices and handle traffic spikes by offloading heavy tasks to a managed message broker like SQS or RabbitMQ.

Queue-based processing turns synchronous bottlenecks into scalable background jobs. By placing a durable buffer (the queue) between your producer and consumer, you protect your database from 10x traffic surges and ensure 99.99% task durability. If a worker fails while resizing an image or sending a transactional email, the message remains in the queue for a retry. This architecture allows you to scale worker fleets independently based on backlog depth (CloudWatch metrics) rather than front-end request volume.

https://aws.amazon.com/sqs/