Hello,
First of all, We (MicroView1 Team of Programmers and Web Designers) are not from US but we have done about 4 security modules working with with payment procedures and money transfer around the world!
I in the name of my team would gladly work on this project, only if you are okay with us being Romanian programmers (you've specified US only). We cannot public our projects - because of our customers privacy, but we can explain our process step by step in order to let you know every step we're doing ...
Please consider our offer a solid one,
Best regards for your idea,
MicroView1 Romanian Team Manager