Front-end Dev for Web & Mobile App

I need someone to design and build a mobile application that can be crossplatform (iOS, Android) using a popular framework like React Native or similar. Must be able to send and receive ajax/http post I need someone to design and build a mobile application that can be crossplatform (iOS, Android) using a popular framework like React Native or similar. Must be able to send and receive ajax/http post request from a backend server. Application will be quite simple with a few pages, (login/signup screen, initial account setup pag...