About This Architecture

Multi-AZ SaaS platform architecture spanning two availability zones with Route 53 DNS, CloudFront CDN, WAF, and ALB handling global traffic distribution and DDoS protection. Cognito User Pool manages authentication, API Gateway routes requests to containerized ECS services and Lambda functions for file handling and subscription workflows. RDS Primary/Standby provides relational data durability, DynamoDB stores user profiles, ElastiCache caches sessions, while SQS, SNS, and EventBridge orchestrate asynchronous email and payment processing via Stripe and SendGrid. This architecture demonstrates high availability, auto-scaling, and separation of concerns across auth, app, data, and services subnets with comprehensive monitoring via CloudWatch, X-Ray, and GuardDuty. Fork this diagram on Diagrams.so to customize subnets, add additional Lambda functions, or adjust RDS instance types for your SaaS workload. Consider adding VPC Flow Logs and implementing cross-region failover for mission-critical deployments.

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How do I architect a highly available SaaS platform on AWS with multi-AZ failover and event-driven payment processing?

This diagram shows a complete SaaS stack spanning two availability zones with Route 53 DNS, CloudFront CDN, and ALB for traffic distribution, Cognito for user authentication, ECS and Lambda for compute, RDS Primary/Standby for relational data, and SQS/SNS/EventBridge for asynchronous payment and email workflows. Each AZ includes dedicated auth, app, data, and services subnets, ensuring isolation a