Application integration for contactless payments

A method, implemented at least in part by a mobile payment application executing on a computing device of a customer and provided by a payment making platform that is associated with one or more first computing devices for facilitating payments between users, the method comprising:

• detecting, by the mobile payment application, an interaction between the computing device of the customer and a transaction code associated with the payment making platform, wherein the transaction code is presented via a point-of-sale (POS) application, provided by one or more second computing devices associated with a payment processing platform for processing payments of merchants, on a computing device of a merchant in association with a transaction between the merchant and the customer, wherein the payment making platform is configured to process the transaction by interaction with the payment processing platform;
• sending, by the mobile payment application, an indication of the interaction between the computing device of the customer and the transaction code to the one or more first computing devices associated with the payment making platform;
• receiving, by the mobile payment application and based at least in part on sending the indication of the interaction between the computing device of the customer and the transaction code to the one or more first computing devices associated with the payment making platform, at least a portion of transaction data associated with the transaction, wherein the transaction data is generated, at least in part, by the POS application executing on the computing device of the merchant;
• and
• presenting, by the mobile payment application via a user interface, at least the portion of the transaction data.

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

• detecting, by a mobile payment application executing on a computing device of a customer and provided by a payment making platform that is associated with one or more first computing devices for facilitating payments between users, an interaction between the computing device of the customer and a transaction code associated with the payment making platform, wherein the transaction code is presented via a point-of-sale (POS) application, provided by one or more second computing devices associated with a payment processing platform for processing payments of merchants, on a computing device of a merchant in association with a transaction between the merchant and the customer, wherein the payment making platform is configured to process the transaction by interaction with the payment processing platform;
• sending, by the mobile payment application, an indication of the interaction between the computing device of the customer and the transaction code to the one or more first computing devices associated with the payment making platform;
• receiving, by the mobile payment application and based at least in part on sending the indication of the interaction between the computing device of the customer and the transaction code to the one or more first computing devices associated with the payment making platform, at least a portion of transaction data associated with the transaction, wherein the transaction data is generated, at least in part, by the POS application executing on the computing device of the merchant;
• and
• presenting, by the mobile payment application via a user interface, at least the portion of the transaction data.