Infrastructure as Code (IaC), Networking, PostgreSQL, Containers, Docker, Terraform, Shell scripting, Python, AWS, Logging, Cloudformation, Pulumi, Redis, Linux, Iam, Sqs, AWS CDK, Asynchronous job schedulers, Secrets management, Cloud security fundamentals, GitHub Actions, Python Flask, Environment isolation, Production observability tools, CI/CD pipelines, Background workers, ECS Fargate, Queues