We do have a botched up Check out form, the checkout form was worked on by a prior freelancer, and it is broken . So you need to trace what is wrong and fix it for the 3 gateways we are about to use.
API knowledge is needed
Design knowledge is needed
Changes need to be done in a way that does not affect updates.
Working hours need to be traced properly
ESTIMATES FOR TIME AND DELIVERY HAVE TO BE SPOT ON. Any deviation from deadlines you define yourself, will be reflected in the job completion review.