Senior performance / scalability engineer - React Native (Expo) + Supabase social TV app

We launched a social TV tracking app on iOS where people log what they watch, follow friends, post, browse a home feed, customize profiles, open show pages, set watch status (currently watching, completed, etc.), and see what’s airing next. We’re live with about 1,800 users. The product works and looks nice, but the app is still too slow - screens take too long to load, and it doesn’t feel ready to grow. Stack Expo (SDK 54) / React Native, TypeScript, Expo Router, Supabase (Postgres, Auth, Storage, Edge Functions), EAS builds and OTA updates. Show metadata comes from TMDB and Trakt. The job We need a senior engineer to review the current system (app + database + background work) and make it fast and scalable. We’ve already done a lot of caching, SQL/RPC work, and client loading improvements. It’s better in places, but overall it’s still not where it needs to be. We’re looking for someone who can diagnose where time is actually going and ship the changes that matter — database, backend, and client — then leave things in a state we can keep fast as we add users. I want a solution to be able to hypothetically scale to 1M users tomorrow, if we wanted. Not just something that will break again at 10k users. Who this is for Strong Postgres and Supabase experience, plus real React Native production work. You’ve scaled a consumer app faster before, not just built features. To apply Send a short note on similar work you’ve shipped, your rate and weekly availability, and how you’d approach the first week. Repo and environment access after we talk.