Abstract: Systems and methods are provided for facilitating mobile commerce interactions between a customer and a merchant, whereby a customer, having initiated a mobile commerce transaction via a mobile device, arrives at a merchant location to complete the transaction. In some embodiments, an intermediate remote server is employed to facilitate communication between a third party app running on a customer mobile computing device, and an app-agnostic merchant computing device residing at a merchant location. In some embodiments, the relative signal strength of a local wireless transceiver associated with a customer mobile computing device is employed to determine the proximity of a customer relative to a merchant at a merchant's premises. This proximity information may be employed to display, on the merchant computing device, a list of customers that is prioritized according to relative proximity.