Temporarily provisioning functionality in a multi-device point-of-sale system

A system comprising:

• at least one merchant-facing device associated with a merchant;
• at least one customer-facing device that is coupled to the at least one merchant-facing device, wherein the at least one merchant-facing device and the at least one customer-facing device comprise a point-of-sale (POS) terminal;
• one or more processors;
• and
• one or more non-transitory computer-readable media storing instructions executable by the one or more processors, wherein the instructions program the one or more processors to perform operations comprising:
• determining that a personal device is proximate to the system;
• based at least in part on an identifier associated with the personal device, determining an identity of a customer operating the personal device;
• based at least in part on determining that the personal device is proximate to the system, provisioning functionality to the personal device by transferring software to the personal device, the functionality (i) configuring the personal device to present a customer user interface (UI) via the personal device to enable the customer to engage in one or more types of interactions with the merchant associated with at least one of building a virtual cart or settling a transaction and (ii) enabling the personal device to interact with one or more of the at least one merchant-facing device or the at least one customer-facing device, wherein the one or more types of interactions are based at least in part on the identity of the customer;
• determining an occurrence of an event;
• and
• de-provisioning, based at least in part on determining the occurrence of the event, the functionality to the personal device by causing removal of the software transferred to the personal device or deactivating the software transferred to the personal device.

One or more non-transitory computer-readable media storing instructions executable by one or more processors, that when executed by the one or more processors, cause the instructions to perform operations comprising:

• determining that a personal device is proximate to a point-of-sale (POS) system of a merchant, the POS system including a merchant-facing device and a customer-facing device that is coupled to the merchant-facing device;
• based at least in part on an identifier associated with the personal device, determining an identity of a customer operating the personal device;
• based at least in part on determining that the personal device is proximate to the POS system of the merchant, provisioning functionality to the personal device by transferring software to the personal device, the functionality (i) configuring the personal device to present a customer user interface (UI) via a display of the personal device to enable the customer to engage in one or more types of interactions with the merchant associated with at least one of building a virtual cart or settling a transaction and (ii) enabling the personal device to interact with at least one of the merchant-facing device or the customer-facing device, wherein the one or more types of interactions are based at least in part on the identity of the customer;
• determining an occurrence of an event;
• and
• de-provisioning, based at least in part on determining the occurrence of the event, the functionality to the personal device by causing removal of the software transferred to the personal device or deactivating the software transferred to the personal device.