An architecture I've been using lately is writing a functional core in F# and importing the library in both C# API backends as well as React frontends. As you k

An architecture I've been using lately is writing a functional core in F# and importing the library in both C# API backends as well as React frontends. As you know, Fable can compile to TS which you can import into your node application. This means that you can have a team of C# developers writing in a language they are familiar with, a team of node/TS developers writing React and a team of F# developers working on a pure functional core with all of the business logic. Write your validators in F# can you can share the same logic for a form in the UI and an API endpoint on the backend. In my opinion having type inference, discriminated unions, computation expressions, et al., makes for a very concise and expressive way to model the core logic of an application.