What tools to use to write a trading platform?

Question

JavaScript

Good day. I can't decide what tools to use to write a trading platform, like https://auction.gocs.pro (not advertising). Can php handle a lot of requests to steam to get prices? , At the moment I'm considering java (Spring) because of multithreading and, as it were, I know the language itself, but I don't know php well. I just don't know what languages ​​are used to write such services.
PS You may need a mobile application in the future.

Answer 1

Such services write on everything. For example, ebay is written in Java, while Avito is written in PHP. What you know, write on it.

Answer 2

React.js/vue.js + API in any language.