The way we are going to handle the money is to take the payment when someone creates a job. The money will be held in an escrow account. Then developers can work on the job and submit their solution. Once the user accepts the work by the developer the money from the escrow account will be released to the developer. There will be a fee for the user while the developer gets the full amount pledged.

If there is a conflict we can step in to resolve it and make a decision. Since the money is in the escrow account it will not be possible for the user to just not pay and the developer cannot just take the money and run before they user accepts the solution.