We begin with a planning session to clearly define the interaction between the front-end and back-end components of your platform. After that, we develop APIs to route data to its intended destinations, such as PayPal for payment processing. For instance, we ensure that payment data is sent to processors, and once a transaction is complete, a confirmation email is automatically sent to the user. Throughout the development process, our developers communicate regularly, both via messaging apps and meetings. Once the app reaches the alpha stage, we perform integration testing to identify and resolve any bugs before delivering the final product.