Many systems are built nowadays using microservices. But microservice do come with a cost of complexity. Some companies are already moving away from microservices. But what to choose instead of microservices then? One of the options is a modern monolith. In this talk, I will show you what the pattern is all about and of course we will build a small system based on this architecture together, so that you can get a good understanding of how to build a modern monolith in .NET.