Developer for Email Coupon Generation + WordPress Plugin Integration

Hello developers, I have an online store and want to provide discount coupons to my customers. To get the coupon, a customer has to sign up to my email list through a landing page. I am using Aweber. When they sign up, they should be given a randomly generate coupon that they can use to get a discount on their purchase. I can set up an autoresponder on Aweber but there is no way of setting up the coupons to be automatically generated and be unique for each user. i.e. I don't want all users to have the same coupon. I want each to have a different coupon that they can redeem. I am looking for someone who can make it possible for Aweber to send randomly generated coupon numbers to my readers. Apart from this, when the users get the coupon, they will have to enter it on the shopping cart so that it can be applied. The shopping cart is WooCommerce WP plugin. So, probably you will need to edit WooCommerce plugin so that when a coupon is redeemed, it will be made invalid (i.e. it cannot be used multiple times.) Please let me know whether you can do this and how much it will cost. Thank you