Must have linux local server , C# app fixing - urgent start

Please Read before bidding We want a very professional and experienced developer C# Senior developer for fixing an issue with our app our app is working Peer2Peer and we changed it to work through kurento server , we made some changes to the backend by another developer but there is some issues with it need to be fixed so it would work perfectly it's urgent start and should be done by the end of the day ! Our Payment terms : After the work is done and tested in your side milestone will be created and releasing will be after getting the files ,( award should be accepted from the start ) because the deal should be officially on freelancer , we done our previous projects with the same way and it's not negotiable if you agree please bid , We are so clear from the begin . Thank you