Systems and methods for on-demand delivery

A system comprising:

• a non-transitory computer-readable storage medium;
• and
• one or more processors coupled to the non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium comprises program instructions that, when executed on the one or more processors, cause the system to perform operations comprising:
• receiving a payer-invite request from a user interface on a first application on a requester device, the payer-invite request requesting an invitation be sent to a payer to pay for a delivery order via a second application on a payer device, the delivery order identifying one or more items to be purchased and delivered to a requester location associated with the requester device or inputted by the requester, wherein the payer is selected via a feature provided on the user interface on the first application on the requester device;
• sending the invitation to the payer device associated with the payer;
• receiving a payment from the payer device, the payment provided in response to the invitation;
• identifying a fulfillment center associated with a merchant;
• identifying a type of vehicle;
• sending a communication to purchase the one or more items from the merchant with pickup at the fulfillment center;
• and
• sending a driving instruction to a driver device or a vehicle device, the driving instruction instructing pick up of the one or more items at the fulfillment center and delivery of the one or more items to the requester location.