Create a Shopify Referral Program for my site

Hello!
I am looking for a Shopify expert to help me identify the right loyalty and referral software to meet the needs of our new eCommerce store.

The right candidate will have a strong understanding of loyalty and referral programs. And we have previously implemented these on Shopify.

Example:
Create a referral program that uses Shopify referral tools to build a new referral program. Some examples might be: invite 5 friends and get X% of your purchase, or purchases for life.

Thanks.