Zahi Benshabad, a senior prototype architect at WS, introduces application development for Backstage.io on AWS. This solution simplifies the developer experience by providing a unified interface for multiple tools and AWS services. The video demonstrates how Backstage.io integrates with external identity providers, streamlines AWS resource provisioning, and offers customizable templates for different application types. A brief demo showcases the creation and deployment of a Node.js Express web app using Backstage.io, highlighting its ability to simplify cloud infrastructure management for developers.