Development of mobile applications for iOS (React Native, AI, SaaS, Mar

I specialize in mobile application development with a focus on iOS — from idea to full release in the App Store and ongoing support. I have experience in creating complete solutions, including frontend, backend, and infrastructure.

Frontend (Mobile):
React Native, Expo, TypeScript, Redux Toolkit, RTK Query, React Navigation, Reanimated, WebRTC

Backend:
Node.js, Express / NestJS, MongoDB (Mongoose), PostgreSQL (Prisma), REST API, WebSocket

Integrations and services:
Firebase (Auth, Realtime DB, Storage), RevenueCat (subscriptions), Stripe, WayForPay, OneSignal, AppsFlyer, analytics (PostHog, Mixpanel, Sentry), third-party APIs

Functionality I work with:
Real-time (WebSocket), push notifications, authorization (including OAuth), payments and subscriptions, media handling, analytics, complex business logic

Full development cycle for iOS:
- task analysis and architecture design
- mobile application development
- backend development and API
- integration of third-party services
- testing and optimization
- preparing builds (EAS / Xcode)
- publishing in the App Store (App Store Connect, certificates, provisioning)

Post-release:
- support and updates for the application
- bug fixing
- adding new functionality
- performance optimization
- scaling the backend part