Hi
I have worked on multiple projects in bots and notification service around exchanges and tradeviews
I have built bots and web apps on BITMEX, Binance, Cryptopia exchanges, etc,. using NodeJs
As a suggestion, I have seen many freelancer who took the project, especially exchange, without understanding the complexity of it and failed, wasting everyone's time! Please make sure you award anyone making sure they knew it!
Each exchange is different from other.