Creation of a cryto currency sales and purchases application

We are looking for a freelancer for the realization of an application for the sale and purchase of crypto currency with several payment models and a diversity of functionalities

We want to develop a website and application on which users can buy or sell cryptocurrency.
-Wants to integrate multiple modes of payment
-KYC integration
-affiliation integration
-wallet management 1 or multiple wallets
-security

reference website: izichange.com