It's not really clear what you're looking for, but I have done a lot of consulting in regards to payment systems and electronic payments. For example, some of my work product is included in one of Ripple's advanced white papers.
My background includes a payments startup called Trancentrix, another company called Vendorin and prior to that I was part of a small team that launched Travelex into commercial payments in the mid-90s.
I would be interested in connecting with you and learning more about your project.