Multi-tenant SaaS architecture on AWS with Route 53 DNS, Amplify hosting, Cognito authentication, and dual API Gateway endpoints (HTTP/REST and WebSocket) fronted by AWS WAF and Application Load Balancers. Traffic routes through highly available EC2 and ECS workloads across two availability zones, with DynamoDB and S3 for persistent storage and Athena for analytics. CI/CD automation via GitHub and ECR feeds container deployments, while CloudWatch, AWS Backup, and AWS Budgets provide observability, disaster recovery, and cost governance. This architecture demonstrates enterprise-grade multi-tenant isolation, auto-scaling resilience, and operational best practices for production SaaS platforms. Fork and customize this diagram on Diagrams.so to match your tenant segmentation, regional failover, or containerization strategy.