POS -> Square Payment API Custom Integration

I'm looking for a developer partner to help with a custom API integration.

We are looking to implement a new iPad - Point of Sale platform.  https://revelsystems.com/  

I have also looked at the Square POS (which for various reasons will not work for our business) however the Square Payments gateway is really interesting, in particular the fact that it can create "Instant Profiles".  The ability to track customer spending by recognising their card at the POS would be extremely powerful.  Square seems to be first mover in this space.

Revel has out of the box integration with Tyro Payments https://www.tyro.com/ and it appears Square provides quite a sophisticated API.

The challenge .. build a custom integration between Revel and the Square Payments gateway - including capturing cumulative customer spend by leveraging Squares "Instant Profiles" capabilities.

Appears doable but I need the help of an experienced developer to pull it off.  Are you up to the challenge?  Could be fun.