React Native Mobile App & Website Front-end

I already run a fully-functional React web application backed by a Java (Spring) API. What I need now is a companion website front-end plus iOS and Android apps written in React Native that talk to the same backend and expose exactly the same feature set... (Budget: $30 - $250 USD, Jobs: Android, API Development, Frontend Development, HTML5, Java, JavaScript, Mobile App Development, React Native)