Hello,
first of all thanks for your posted project, let me give to you brief understanding for your application development ,as you want centralizes user to trading exchange from your sties and we need to cover all 190 coins multi coins crypto's currency for trading . and we need to cover trading engine , creating matching engine, two factor authentication with KYC authentication process for user verification for registration, refrral program, multi currency wallet with hot and cold wallet features, Users the ability to place buy and sell orders. Initially, it also needs to allow users to register, maintain a balance, deposit and withdraw and 10000 trading per single time slot user could make trading and each trading monitoring from admin. you said that Matching Engine/ Trade Engine that looks at the current buy and sell orders and matches orders together and executes the trades. please can you clear me more about it. and here please check our multi coins wallet system and i changes those reference sites. those are based on blockchain decentralize transaction process with POS based process for each transaction and token generation. and CRM system you have we need to integrate with your site. and also user private key must be in high security. and user could take a backup and store all transaction into local drive. and also provide your high secure network for overall process . you have AWS cloud serve or other one ? all UI Designs web pages and admin web pages you have