With this session, you will learn how to setup a Kotlin Ktor project with some routes using the framework tools and features (Routing, DataConversion, ContentNegotiation...) and communicate with a sample Android app. Let see how we can easily setup a Postgres database connection with Exposed, an ORM library for Kotlin and see how clean architecture can be a good choice for developping your brand new API. We can even go further and see that we can actully share code from your backend application and your Android application (say hi to Swagger!).