Multi-AZ e-learning platform on AWS with Route 53 DNS, CloudFront CDN, and WAF protecting static assets in S3. Application tier spans two availability zones with ALB, EC2 FastAPI backends, ECS Fargate services for React frontend, WebSocket, and course delivery, plus ElastiCache Redis for sessions and chat. Data layer uses MongoDB Atlas, RDS PostgreSQL, DynamoDB, and EFS across AZ-1 and AZ-2 with automatic failover and replication. Cognito handles authentication, Lambda processes payments and analytics, SQS manages media workflows, and SNS delivers push notifications via SES email. This architecture demonstrates high availability, disaster recovery, and horizontal scaling for concurrent student and teacher access. Fork and customize this diagram on Diagrams.so to adapt subnet ranges, instance types, or add cross-region replication for global reach.