A computer system can receive position information indicating a current location of a user of the network transaction service from a computing device of the user, and generate map content for display on the computing device of the user based on the position information. The map content can indicate locations of a plurality of merchants within a vicinity of the current location of the user that utilize the network transaction service. The system can receive a transaction request from the computing device of the user, the transaction request indicating a transaction amount and a specified merchant of the plurality of merchants. The system then executes a remote transaction operation to transfer funds from a shared account of the network transaction service to a merchant account of the specified merchant to fulfill the transaction request.