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Based in Vancouver, BC, Payfirma has created an XML-based API that promises custom forms and full shopping carts to keep you in control of developing the flow of your credit card processing. The idea is to make business's lives simpler by reducing development costs with the Payfirma API that accepts Visa, Mastercard, Discover, and American Express among others.
There are so many jobs listed for developers familiar with the Paypal API on GetAFreelancer that the site has a category dedicated to it. And that's not all--there are over 300 API-related listings on the site, which connects freelancers with people who need programmers and designers.
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