Three-tier AWS deployment pattern combining Application Load Balancer, Auto Scaling EC2 instances, and RDS with read replicas across multiple availability zones. User traffic routes through ALB to Node.js app servers running on t3.medium instances in an Auto Scaling Group, which connect to a PostgreSQL primary database with read replica failover in us-east-1b. Static assets are served from S3, reducing compute load and improving response times. This architecture demonstrates high availability, automatic scaling, and database redundancy best practices for production workloads. Fork this diagram on Diagrams.so to customize instance types, add additional regions, or integrate CloudFront caching.