SQL Server, Postgres, Query optimizers, transaction isolation, Indexing, Capacity planning workload modeling and cost optimization, Leveraging AI to automatically identify bottlenecks, Designing and supporting database-backed APIs, Cloud platforms AWS and Azure including managed database services, Infrastructure as Code using Terraform, Aurora, Building automation and tooling to support database performance and reliability, execution plans, Statistics, Performance monitoring troubleshooting and tuning in distributed systems, CI CD pipelines and deployment automation, SQL performance tuning and optimization