What is the technology stack on the back end of cryptocurrency exchanges?

Question

Backend

What technology stack is often used on the back end of cryptocurrency exchanges?

Answer 1

Each has its own. In principle, there can be any stack that can adequately solve the problems of a cryptocurrency exchange.
Java/C#/go, with their set of frameworks/libraries, most likely.

Answer 2

Which one the development team knows best, that one uses.

Answer 3

Anyone, but often done on Node.js - like it works faster with transactions due to asynchrony :)