Ktor is a framework for building web applications with Kotlin that allows for quickly creating backends. It is a pure Kotlin framework that is unopinionated and supports asynchronous programming and various features like logging, templating, messaging and persistence out of the box. Ktor applications can be deployed to servlet containers or run standalone with embedded servers like Netty or Jetty. The framework is highly performant thanks to its use of Kotlin coroutines and thread pooling. It also supports building RESTful APIs and websockets. The presentation provides examples of implementing common backend services like user registration, verification, subscriptions and chat with Ktor.