Event-driven order processing pipeline using AWS SQS, payment gateway integration, and DynamoDB invoice storage with centralized CloudWatch logging. The sequence spans five phases: order ingestion to SQS, message consumption by payment and notification services, payment processing with invoice management, notification dispatch, and unified observability via CloudWatch Logs. This architecture decouples order intake from payment processing, enabling horizontal scaling and fault isolation across services. Fork and customize this diagram on Diagrams.so to adapt payment workflows, add retry logic, or integrate additional AWS services like Lambda or SNS. Note the critical warning: payment-workflow lacks SQS DeleteMessage implementation, creating duplicate processing risk—essential to address before production deployment.