Developer required for Server Side script modification

We have a working Roulette (Casino) project in which we need some changes in server-side coding according to client's requirements. We need experienced developer who can handle this task and also can work ongoing on this project. Some examples are: 1. Presently our system is paying commission to Dealers & Distributors on daily basis, which we need to pay on weekly basis. 2. Presently Admin is paying commission to distributor and dealer seprately, means business from dealer has NO relation with distributor commission. But now distributor commission will be decided from dealer's Profit/Loss performance. (We have ready logic for this) 3. Presently, some functions are open for distributor & dealers. We need admin previliges before approve them. 4. some reports are unlimited length to view by dealer/distributor. Which we wish to show them for admin decided period. Please bid only if you have experience to handle this project. We need this project to be done in max 3 working days.