Nikolay Dobromirov, Petyo Stoyanov FFW, Sofia, Bulgaria Implementing a decoupled application in 2019 with Druplal has never been easier than now, having JSON:API in core. The problem is that this is covering only one side of the story - the back end one. On the application side you are starting from scratch. In this session we will cover: - The process of replacing the whole themmig layer with React in a fully decoupled multi-site context. - How we’ve achieved Drupal’s level of flexibility on content level with displays and field formatters. - Handling the data visualization for dynamic nested pieces of content. - SEO considerations and server side rendering - How all ties together and plays nice with Drupal’s page cache meta-data, so reverse proxies can be invalidated and keep the site fast.