Multi-AZ food coupon QR system leveraging AWS WAF, CloudFront, Route 53, and dual Application Load Balancers across us-east-1a and us-east-1b for high availability. Traffic flows through CloudFront CDN to Route 53, then ALBs routing to EC2 Registration and QR Scan APIs, ECS QR Generator, and Lambda functions for duplicate checking and report generation. RDS MySQL Primary/Standby, DynamoDB Global Tables, ElastiCache Redis replicas, and SQS event queues ensure data consistency and resilience across availability zones. This architecture demonstrates enterprise-grade fault tolerance, auto-scaling capabilities, and operational monitoring via CloudWatch, solving critical uptime and data integrity challenges for large-scale coupon distribution. Fork and customize this diagram on Diagrams.so to adapt subnet ranges, instance types, or add additional AWS services like SNS or Kinesis. Consider adding VPC Flow Logs and AWS Config for enhanced compliance and security auditing.