SharePoint 2016 on premise - can the server side web service be anything that accepts JSON?
We are running SharePoint 2016 on premise and will stay on premise for at least the next 2 years. I have been reading that most of the development done with SharePoint 2016 is client side development meaning that the web part executes on the client endpoint, not server side language is needed.
However for some of the custom apps where we need the business logic in c# / WCF or something like that, will it work with anything that accepts and returns JSON?
Microsoft recommends using "Azure Functions" for this, but again we have web services in our environment that can JSON, so we want to leverage the existing infrastructure.