Pulumi's infrastructure as code approach streamlines the deployment of AWS microservices by simplifying the process into a concise 28 lines of TypeScript code, eliminating the need for complex YAML configurations or multiple CLI commands. This method leverages AWS's native capabilities, such as ECS, Fargate, and ECR, allowing for the efficient creation and management of containerized services with features like load balancing and auto-scaling. The process is designed to enhance productivity and enable repeatable deployments across various environments, integrating seamlessly with CI/CD pipelines and supporting other cloud providers like Azure and GCP. Pulumi's solution not only facilitates infrastructure provisioning but also tracks deployment state for reliability and team collaboration, akin to Git's functionality with GitHub.