Sitecore JSS and Sitecore Headless have been out for a few years now, but we started our first headless project last year. Our chosen stack was Sitecore Headless 10.2 with Next.js SDK (19.0.0) using Server-Side Rendering (SSR). I would like to talk about two main topics in this post. The first one is how the development processes are changed because of the changed tech stack. The second part is about the technical challenges we met during the implementation.