1)Should have experience in building bitcoin sites with wallet storage similar to [url removed, login to view]
2)Should tell your experience how you integrated APIS with methods for bitcoin transactions and how you can withdraw bitcoins into multiple local currencies, which API or plugins were used?
3)Need to document whole process from user login,buy and sell via wallet,withdraw into local currency,if you are refferring to some API's ,how much would it cost per transaction or which is the cheapest?
Document should be easily understandable and you need to explain if there are any questions.
This is a kind of market research