Integrate an existing React Native App(code shall be provided by me) to existing Webservices (will be provided by me)

Hello to all devs out there ! Looking for very serious developers and who's got good knowledge on React Native especially have done some good quality code works. Looking for someone to integrate my React Native app code with the backend Webservice API code (RestFul API). The app concept is based off of ride sharing/car pooling. A concept similar to Blablacar. I am again saying this, I NEED ONLY SERIOUS DEVELOPERS. Quote me an exact rate and timeline I use websockets in the backend API for the Chat System. Additional to the integration of the API . the following needs to be added too on the React Native App : 1. Facebook Login Integration 2. Google Login Integration 3. Payment (C2C - Preferred) gateway integration 4. Usage of proper eslints (good quality code - readable and maintainable) 5. Push Notifications through One Signal React Native SDK (on client side - user to user push) 6. Usage of Mobx or Redux state management to ensure to save some states for the user session 7. Overall cleanup of the code for better readability & maintainability. I have attached a dummy UI reference APK here . Please go through entirely before bidding. I need only exact bids and not approx bid for the sake of bidding. Looking to work with some knowledgeable devs on a long run. P.S : I'm a developer myself. So please know what you're asking and talking for before getting those questions to my table.