We are looking to have someone integrate Paypal's "express checkout" as an additional checkout option into our pre-existing custom built shopping cart. Our current site / cart uses .net and is written using VB so you must be familiar with them.
The basic explanation from Paypal says: "Express Checkout uses three API calls during a checkout flow that is optimized for customers who wish to pay with PayPal. Express Checkout offers a "wallet" capability where your customer uses the billing information stored in their PayPal account and does not have to enter payment details or shipping information on your site."
To see Paypal's documentation of what you will be required to do as well as developer tools, you can go to these links:
[url removed, login to view] (you'll be doing the EXPRESS checkout, not the STANDARD checkout)
[url removed, login to view]
Technical documentation .pdf available here: [url removed, login to view]