Andersen Windows, a $3.4B annual revenue door and window enterprise, recently transformed their monolithic tech stack to a composable one using Sitecore, Next.js, and Vercel, resulting in improved user experience, peak site performance, and increased conversions. The company aimed to deliver an omnichannel experience, boost site performance, and improve developer efficiency by leveraging the headless capabilities of these technologies. With Horizontal Digital's help, they achieved significant ROI and leadership buy-in through a gradual, incremental approach to digital transformation, enabling them to showcase business value and accelerate time-to-market for new features. The adoption of Vercel has improved site resiliency, reduced development costs, and provided peace of mind for the dev team, while Next.js has enhanced their Google Core Web Vitals and driven higher rankings on search engines, ultimately bringing in new customers and revenue.