Cloudflare's Durable Objects are a new JavaScript runtime that makes building stateful, on-demand backend servers on the edge as easy and cheap as serverless functions. By colocating compute and state, Durable Objects melt complexity at scale, and allow you to focus on building your product.In this fast-paced talk we'll live code a real-time backend from scratch, show how Durable Objects work, and explore how you can apply this versatile tool to a wide range of everyday engineering problems.