Design custom multi-tier Virtual Private Clouds (VPC) with public and private subnets
Implement auto-scaling compute clusters with Application Load Balancers
Architect serverless applications using AWS Lambda, API Gateway, and DynamoDB
Configure automated relational database replication and failover with Amazon RDS
Enforce Zero-Trust security with IAM roles, policies, and KMS encryption
Optimize AWS cloud spend through Reserved Instances, Savings Plans, and S3 Lifecycle rules