Avanade, the world's leading expert on Microsoft, transformed its digital landscape by adopting a headless approach with Sitecore XM Cloud and Vercel. This migration enabled the company to establish a modern, composable system capable of delivering highly responsive experiences to global clients. The new stack combined edge computing, automatic scaling, and user-friendly CI/CD workflows, resulting in improved performance, reduced carbon emissions, and enhanced developer experience. With Vercel's Edge Network intelligently caching and delivering content, Avanade achieved a 42% decrease in carbon emissions and streamlined deployments, allowing the company to respond more quickly to market needs while retaining its existing technology foundations. The transition also provided Avanade with a decoupled frontend framework, paving the way for a more modular, adaptable architecture.