Senior React Native/Expo Developer Needed to Fix & Finish Existing iOS App

I’m looking for a React Native/Expo developer, ideally with strong video/audio experience, to help finish an app that is already substantially built. The product and backend are already in place and much of the core pipeline is working, but I’ve reached the stage where a number of real-device issues are preventing me from getting it properly finished — processing getting stuck, camera/zoom behavior, audio quality, and a few video-flow issues. I need someone who can come into an existing codebase, understand what’s already there quickly, test it on a real iPhone, diagnose the actual causes, and fix them — not rebuild the product from scratch. The stack includes React Native/Expo, Replit, AI APIs, video storage/processing, and Remotion/AWS Lambda. The person will need access to the project, so trust, experience, and strong references are very important. I’m looking for someone who can start immediately and move fast.