I need a skilled developer to assist with a minor change to a php website. This is just a minor project but if all goes well, then will definitely come back with future work.
The change consists in skipping the credit card processing when customer introduces a promotional code that zero rates the payment. This is for a one-off promotion and I need someone with previous experience with shopping cards, promo codes, etc.
Please place a realistic bid and also send me a couple of lines including previous work and why you should win this project.