React Native & Node.js developer for release audit

I need an experienced React Native / Expo and Node.js developer to conduct a final release audit for my full-stack mobile app and backend. Check for release blockers, crash risks, broken flows, auth and payment flows, security/privacy issues, and app store readiness. Provide a short written report first; no code changes until approval. Must have experience with Stripe, Google OAuth, mobile release and security best practices. This is a fixed-price audit only.