Cloud Architecture Design
Well-Architected cloud architecture on AWS (primary), GCP, or Azure: VPC design (network segmentation public, private, database subnets), compute selection (EC2 for legacy, ECS Fargate for containers, Lambda for serverless), database tier (RDS Multi-AZ, Aurora Serverless, DynamoDB), storage (S3, CloudFront CDN). AWS Well-Architected Framework review (five pillars).

