Integrate Backend API for Logistics App

Hi, I am setting up an on-demand logistics app using the PoketPorter package from CodeCanyon. The frontend apps are native Android built in Java/XML. I need assistance with integrating the backend API to ensure seamless functionality and data exchange. The ideal candidate will have experience in API development and integration, particularly with RESTful architecture and JSON. This project requires an intermediate level of proficiency and is expected to be completed in less than a month.