React Native/Expo Expert Needed - TestFlight release Build Debugging

I’m looking for an experienced React Native + Expo developer to diagnose and fix an iOS release build issue. The Problem The app works perfectly in: * Expo Go * Development builds * Local testing The app successfully builds with EAS, uploads to App Store Connect, installs from TestFlight, and launches. However, after opening the TestFlight build, it stays stuck on the launch/splash screen indefinitely. There are no issues in Expo Go, only in the production/TestFlight build. Tech Stack * Expo * React Native * EAS Build * TypeScript * iOS / TestFlight * Built with Expo (not a bare React Native app) What I Need I’m looking for someone who can: * Diagnose why the production build hangs during startup * Identify the root cause (not just trial-and-error fixes) * Fix the issue so the app launches correctly in TestFlight * Explain what caused the problem Experience Required Please only apply if you have experience with: * Expo SDK * EAS Build * TestFlight release builds * Xcode debugging * Production-only React Native issues * Hermes * Expo config plugins * Native module integration When You Apply Please answer these questions: 1. How many Expo apps have you personally shipped to the App Store? 2. Have you fixed apps that worked in Expo Go but failed in TestFlight? Please describe one example. 3. What would be the first three things you’d check for an app that’s stuck on the splash screen only in a production build? 4. Are you comfortable using Xcode/device logs to diagnose startup issues? Access I’ll provide: * Full source code * GitHub repository * package.json * app.json/app.config * eas.json * Build information * Any logs you need I’m looking for someone who can identify the root cause efficiently rather than trying random fixes.