Strong knowledge of AWS cloud services, particularly serverless and event-driven architectures, including AWS Lambda, API Gateway, eventing services (SNS/SQS/Kinesis/EventBridge), monitoring/observability (CloudWatch), IAM, and networking/connectivity patterns. Experience with database technologies, including designing and working with relational databases (e.g., PostgreSQL, MySQL, SQL Server) and NoSQL databases (e.g., DynamoDB, MongoDB).