woocommerce API customization

New freshers on freelancers with minimum experience of 5 Years and 100+ projects done are welcome. I need a woocommerce ,soap,API expert to create/ modify an extention to match my requirement of purchasing virtual product. All i need is this API to work perfectly with the third party [login to view URL] document is available. I will contact every bidder who agree on my budget and time. i have only two days to complete this so make sure you are available right now. No middle man please. No front payment until i see the work half done because i already have bad experiences many times.