Hello,
Your job description is not very detailed, but I believe I can help you nonetheless.
I have experience programming Betfair bots from scratch, so I do have detailed knowledge of the API; not only building on some third party libraries.
But you need to provide more info. What are the problems you're having? Do you know what is causing the problems? Do you use API-NG, or the old API?
Please note: I don't like to give misleading bids, but your job description is not detailed enough for me to give an accurate cost estimate. Therefore, I've entered the minimum bid allowed, and suggesting 7 days delivery time. You need to understand that these numbers will likely change after you provide more details. It might actually be cheaper and faster :)
In conclusion: You need to send more details before I can give a correct bid.
Have a nice day!
Best regards,
Tor