Subscription System ExpressionEngine & Cartthrob. Integrated with WorldNet gateway

We currently have a site developed in ExpressionEngine using cartthrob as the e-Commerce module. We are looking to take recurring payments, either via the cartthrob subscriptions module, or a custom built module. We also need to integrate with WorldNet payment gateway.

Developer must be comfortable developing/customising ExpressionEngine module and also creating the gateway integration for WorldPay.

We are looking to start the project immediately.