Integrate Zoho Crm And Projects With Website 2

I need to integrate all features of ZOHO project and Zoho crm with the backend of my website using the zoho api.

You must have doneths before and can show demo. I need this as soon s possible.

I already have paid accounts with zoho I just want my clients and employees to login through my url and see my website design over the zoho application.

Thanks.