Stock Trading App with Social Angle

It's a stock trading app with a social angle. It's a project in validation state. Looking for a UX designer who can help us envision and build the product from scratch.
Steps for evaluating the UX individual/ firm
a) Reviewing previously done work - (preferably mobile apps)
b) UX guys presenting a case study for a project done from scratch in below form
- what was the brief and problem statement given by the client
- how did you/your team approach the problem
- modus operandi and involvement with client
- time to delivery
- what steps were take to reduce iterations

Evaluation criteria would include