AJ

Freelance React Native Developer for Production Mobile Apps

I build cross-platform iOS and Android applications with React Native and Expo, including authentication, payments, APIs, offline workflows, notifications, and production deployment.

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React Native + Expo · iOS + Android · End-to-end delivery

10,000+ Students Served*
450+ Faculty Users*
9 Departments*
Web + Mobile + AI Systems
Payments + Subscriptions
Offline-First Architecture

Problems I Solve

From initial mobile MVP builds to store submissions, offline caching, and backend API integrations, I build cross-platform mobile apps that ship.

Cross-Platform Mobile Apps

Build iOS and Android apps from one React Native codebase without sacrificing native feel or production performance.

Mobile MVPs

Turn a product idea into a working mobile MVP with authentication, REST APIs, core workflows, UI, and release pipelines.

Offline-First Apps

Build applications that continue working reliably under spotty connectivity using local SQLite/IndexedDB storage and background sync.

Payments & Subscriptions

Integrate mobile billing systems - Apple In-App Purchases, Google Play Billing, and Razorpay - with entitlement verification.

Real-Time Apps

Build live score updates, standings, notifications, dynamic state synchronization, and messaging in mobile apps.

App Backend Integration

Connect mobile apps to secure REST backends, Supabase, PostgreSQL, AI microservices, push notifications, and cloud storage. See Full-Stack.

Selected Production Mobile Work

React Native & Expo mobile developments built for real user workflows and store distribution.

Live Production Mobile App

Thozhan AI - Production exam-prep mobile application on Google Play

Live Site Play Store Listing

React Native (Expo) mobile application featuring offline-first SQLite caching, SM-2 retention modeling, Gemini AI answer evaluation for handwritten tests, and production subscription billing. See AI Development details.

The Problem

Students needed a mobile prep app that evaluated handwritten answers, scheduled review questions via spaced repetition, and worked offline during commute.

Engineering Highlights

  • React Native (Expo) cross-platform architecture
  • Supabase PostgreSQL backend & Edge Functions
  • Gemini API evaluation for handwritten images
  • Offline-first SQLite local persistence
  • Apple IAP, Google Play Billing & Razorpay
  • EAS Build pipelines & Sentry crash monitoring

Outcome & Deployment

Live on Google Play Store with production mobile subscription billing.

Production Mobile Status: Live on Play Store · 3 Billing Gateways
App Prototype

Triblet - Real-time sports tournament mobile application

A React Native / Expo application for tournament creation, team management, match scheduling, real-time scoring, live standings, and notification updates.

The Problem

Tournament organizers needed a mobile app to manage fixture generation, round-robin/knockout brackets, and instant live leaderboard updates.

Engineering Highlights

  • React Native & Expo cross-platform framework
  • Real-time score updates & dynamic standings engine
  • Multi-format tournament bracket scheduling
  • Firebase / Node.js backend integration
  • Push notification triggers for game status

Outcome Note

Functional mobile application prototype developed during full-stack engagement (Nov 2024–May 2025).

Status: Working Mobile App Prototype
App Prototype

NeuraCare - Privacy-focused mobile health assistant

A React Native mobile application combining health conversations, symptom tracking, medication reminders, and on-device encrypted storage.

The Problem

Health app users needed continuous symptom tracking with strict local privacy constraints for confidential medical notes.

Engineering Highlights

  • React Native & Expo Router navigation
  • Realm / on-device encrypted storage
  • Google Generative AI conversational features
  • Firebase authentication & local notification scheduling

Outcome Note

Privacy-focused health assistant prototype demonstrating local encrypted database storage.

Status: Mobile Application Prototype

Why Work Directly With Me?

Full-Stack Mobile Ownership

I build the app frontend, backend REST APIs, authentication, push notifications, and database schemas. No separate backend developer needed.

Play Store Release Experience

I handle EAS builds, Play Store publishing, app signing, store compliance, and release updates directly.

Offline-First Architecture

SQLite caching, on-device encrypted storage, and sync queues ensure your app stays responsive without cell signal.

In-App Purchases & Subscriptions

Apple IAP, Google Play Billing, and Razorpay integration built with server webhook verification and entitlement logic.

How the Engagement Works

A clear, transparent process from initial requirement to shipped mobile app.

01

Define the Problem

We identify what your mobile app does, target iOS/Android devices, key user flows, and MVP launch scope.

02

Scope the Build

I define the React Native component structure, Expo configuration, REST API endpoints, database models, and store requirements.

03

Build & Test

Development proceeds across cross-platform UI, backend services, offline storage, payments, and testing on real devices.

04

Deploy & Ship

I handle EAS production builds, App Store & Google Play Store submission, metadata, app credentials, and launch.

05

Ongoing Support

Bug fixes, OS updates, new feature releases, push notification management, and technical updates available retained.

Project Fit

Good Fit If You Need

  • A cross-platform React Native / Expo app built from scratch.
  • A mobile MVP ready for Play Store & App Store submission.
  • Offline caching, local storage, or background sync.
  • In-app purchases, Google Play billing, or Razorpay mobile checkout.
  • A single developer to build both the mobile app and backend APIs.

Probably Not a Fit If

  • You are looking for low-code / web-wrapper app builders.
  • You require deep native Swift/C++ engine work for 3D games.
  • You want design mockups without any React Native implementation.
  • You need a large agency team with non-technical managers.

Technologies I Work With

Mobile Frameworks

React Native Expo Expo Router TypeScript JavaScript

Mobile Backend & APIs

Supabase Firebase Node.js FastAPI REST APIs

Mobile Data & Storage

SQLite Realm DB AsyncStorage PostgreSQL Encrypted Storage

Mobile Payments

Google Play Billing Apple In-App Purchases Razorpay SDK Webhook Verification

Deployment & Monitoring

EAS Build Google Play Console Apple Developer Connect Sentry Monitoring

Frequently Asked Questions

Do you build for both iOS and Android?

Yes. React Native and Expo allow a single codebase to deploy to both iOS and Android platforms with native performance, custom UI, and platform-specific tweaks when needed.

Can you implement subscriptions and in-app payments?

Yes. Relevant experience includes Apple In-App Purchases, Google Play Billing, Razorpay mobile checkout, entitlement logic, and backend payment webhooks.

Can you work on an existing React Native app?

Yes. I can audit existing codebases, fix bugs, add new features, refactor performance bottlenecks, implement offline caching, and prepare builds for app stores.

Can you build the backend for the mobile app?

Yes. Mobile applications can be delivered alongside complete backend APIs, databases (Supabase/PostgreSQL), authentication, notifications, and cloud services.

Do you work with international clients?

Yes. I work remotely with startups and founders across the US, UK, Canada, Australia, Singapore, UAE, and Europe with flexible overlap hours.

How does pricing work?

I offer fixed-scope project pricing for defined mobile apps, MVP packages for new products, and ongoing engineering support on a retained basis.

Let's build the thing you're trying to ship.

Tell me what you're building, where you are today, and what you need help with. I'll review the requirements and determine the most practical way to move forward.

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