Client Exec payment gateway plugin

We require an experienced coder, ideally experienced/familiar with the client exec billing system. The project involves writing a plugin for an uncommon payment processor. Must work with recurring billing as well as one-off billing. Full integration document has been uploaded and is available. Documents showing the coding for 2checkout plugin for client exec has also been uploaded as an example if needed. We will provide a live development and testing environment if required. If you submit a bid, please also send a message outlining your past experience with client exec and / or payment gateway plugins and integration or why you believe you can actually do the project. Please do NOT bid unless you are absolutely certain that you can deliver the project in full working order within 10 days maximum. Because client exec regularly upgrades, we also require documentation clearly outlining the integration process so that we can re-apply it with future upgrades if need be. An experienced PHP coder who has genuine knowledge of client exec and/or the integration of payment processor plugins will be able to complete this project within a few hours max. Please do not place a bid if you do not have the necessary experience and knowledge.