Member referral programme (i.e. Dropbox)

Looking for someone who understands the referral programme SAAS landscape to take on our new member programme, and guide on some options for a suitable software services.

We are an offline recruitment service, using stripe to subscribe members via our website.

We want to be able to offer custom rewards which don't need to be API triggered, as for now we will manually apply these credits to our system.

We also want members to be able to invite their friends and track progress via said system, perhaps by logging into a white label interface hosted on a subdomain of ours.