Developing the Backend for the ICO

Hello, we have already a basic website with all the information about our project online. But we need the backend of the website programmed where the people can buy the tokens when we start our ICO. It's important that when the people get part of the pre-sale and buy our tokens it's all automatized and the people get their tokens send to their wallet. KYC should be integrated. Payment methods for the Token should be, buy directly over our website via credit card, Tron, Ethereum, Bitcoin, USDT We have already created the token. It's a TR20 Token.