Build a Website for voucher management

Hi I need to hire a company to create a voucher management system component. Think of something like [login to view URL] where you have escrow [login to view URL] website will allow customers to purchase deals (coupons/vouchers) that are redeemable at third party service/goods providers (my partners, the vendors). I can then payout to the service provider ( partners. e.g. restaurant)minus my fee (once the deal is redeemed). Before I engage in any discussion with any provider, it's of paramount importance that you prove beyond any doubts that you have multiple references in creating similar system. You will be requested to exchange a detailed pack containing backend screenshots that you have created for your customers to allow them to manage the complete ecosystem and their multiple partners. The bigger the pack, the higher will be your ranking and ability to secure this [login to view URL] pack, no discussion. Please don;t waste your time or my time if you haven't built something like this before. I don't have any time to do experiments. References linking to a payment gateway such as Stripe and an accounting system such as MYOB will be highly regarded. I need to be 100% sure you know how the website of this type of business can be executed. There are already some ready made components in the market, but I don't believe it will satisfy my needs as I will require customization on top while this software doesn't allow customization.