Salling Group, Denmark's largest retailer, faced challenges in its monolithic architecture, including downtime, slow speed to market, and duplicate implementations. To address these issues, they adopted a composable tech stack with headless e-commerce, leveraging Netlify as their platform for serverless functions and Algolia for search engine application. This transformation has led to improved frontend development hours, boosted time-to-market speed, encouraged an open source approach among engineers, and enabled faster incremental builds and experimentation on less-trafficked sites. The company's digital team now benefits from a more flexible architecture that allows them to build tech stacks with applications performing specific functions, resulting in enhanced developer productivity and customer satisfaction.