Finish & Launch iOS App with Offline Audio Sync, Team Workflow, and App Store Support

We are looking for an experienced mobile app developer to help finish and prepare an existing iOS app for App Store launch. The app is already designed/built with approximately 21 screens on Swift UI. It is a Bible translation workflow app with an audio-first approach. Users can work individually or as part of a team, record or submit translation work, sync their work when online, and eventually route submissions to a review workflow for biblical scholars/professional reviewers. This is not a full rebuild unless the audit shows that a rebuild is truly necessary. The goal is to inspect the existing codebase, identify what is needed to make it production-ready, finish the remaining functionality, and prepare the app for TestFlight/App Store submission. Core app requirements: Offline-first or offline-capable recording/draft experience Audio recording and/or audio upload Written translation support where applicable Sync pending work when the device comes back online User authentication Individual and team-based workflows Team members can see relevant work/progress from others Audio submissions should upload to object storage Submission metadata should be stored in a structured database Basic review workflow/status tracking App Store/TestFlight launch preparation Preferred stack: Clerk for authentication/users Railway for backend/API hosting Neon Postgres for relational data Cloudflare R2 for audio/file storage Temporal for longer-running workflows where appropriate We are open to Firebase only for mobile-specific services like push notifications, crash reporting, analytics, or app distribution, but we do not want Firebase/Firestore to become the default primary database unless there is a strong technical reason. Initial paid milestone: technical audit and launch plan Before committing to the full implementation, we want a paid audit of the current app/codebase. Audit deliverables: Summary of current app/codebase condition What is complete vs incomplete App Store launch-readiness assessment Backend/storage/auth integration plan Offline sync plan for audio and written drafts Risks or blockers Recommended fixed-price bid and timeline for completing the launch-ready version Ideal developer: Has shipped iOS apps to the App Store Comfortable with mobile offline sync Strong experience with audio recording/upload workflows Comfortable with backend/API integration Understands relational data modeling Can work with GitHub Can communicate clearly and document decisions Can use AI coding tools effectively, but still understands the architecture and code quality Please answer these questions in your proposal: Have you shipped an iOS app to the App Store? Please share examples if possible. How would you approach offline audio recording and later syncing? How would you store large audio files versus submission metadata? Are you comfortable working with Clerk, Railway, Neon/Postgres, Cloudflare R2, and Temporal? What would you look for first during a technical audit of the app? Would you recommend Firebase, Supabase, or Postgres for this type of app, and why? Are you willing to start with a fixed-price audit before bidding the full completion phase? We prefer a phased approach: Phase 1: Technical audit and launch plan Phase 2: Finish implementation and TestFlight-ready build Phase 3: App Store submission support Please include your fixed price for Phase 1 and your estimated range for Phase 2 after audit.