React Native / Expo Developer

About

I am looking for an experienced React Native / Expo developer to complete my iOS journaling app, Black Box Journal. The skeleton is built and working — I need someone to finish and polish it for App Store submission.

Tech Stack

• Expo SDK 55
• TypeScript
• Expo Router
• Supabase (@supabase/supabase-js v2)

Scope of Work (7 deliverables)

1. UI Polish — consistent spacing, typography, colours, dark/light mode
2. Supabase RLS Security — row-level security policies, data persistence for journal check-ins
3. RevenueCat IAP — Annual £24.99, Monthly £4.99, Lifetime £149 (must show proof of prior RevenueCat work)
4. Apple Sign-In + Email Auth — complete both auth flows
5. Push Notifications — expo-notifications, daily journaling reminders
6. Data Persistence — all check-in data saved to Supabase correctly
7. AI Mood Trends — lightweight OpenAI API (GPT-4o mini) mood analysis

Payment Structure

• Fixed price, 3 milestones (40% / 35% / 25%)

Budget

• Up to £500

Deadline

• 28 May 2026

Screening Requirement

Please include a link or screenshot showing a previous RevenueCat integration in your proposal.