I will build a custom mobile app with API integration

F
fawadkaleem462
F
fawadkaleem462
Fawad Kaleem
build a custom mobile app with API integration
build a custom mobile app with API integration
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build a custom mobile app with API integrationbuild a custom mobile app with API integration

About this gig

Custom Mobile Apps with Real Backend & API Integration

Need a mobile app that actually talks to your backend not just a static UI? I build custom mobile apps using Flutter, integrated with Firebase and custom REST APIs, delivering one codebase for iOS and Android.

What I Handle:

  1. Custom REST API integration (your existing backend or third-party APIs)
  2. Firebase backend (Auth, Firestore, Storage, Cloud Functions)
  3. Third-party integrations: payment gateways, maps, push notifications
  4. Admin dashboards connected to live data (Flutter Web)
  5. File handling, CSV export, document previews
  6. Real-time data sync, runtime status logic
  7. Clean architecture built for scaling

Tech Stack: Flutter, Firebase, REST APIs, Dart, Flutter Web (admin panels).

I've built and shipped production apps connecting Flutter frontends to both Firebase and custom REST APIs including admin dashboards with live trip management, file previews, and user management with bulk actions and CSV export. I understand how to wire a mobile app to a real, working backend, not just mock data.

Message me your API docs or backend setup and I'll scope the right package.

  • App type

    • Hybrid

  • Programming language

    • TypeScript
    • React Native
    • Flutter

  • Frameworks

    • Flutter
    • Node.js

  • Purpose

    • Chat
    • Dating
    • Delivery
    • Streaming
    • Music
    • Restaurant
    • Shopping
    • Taxi
    • Booking
    • Finance

  • Tools

    • Android Studio
    • Xcode
    • Visual Studio Code

  • Expertise

    • Localization
    • Ads & monetization
    • Data storage
    • Release management
    • API integration
    • Compatibility

Get to know Fawad Kaleem

Fawad Kaleem

Mobile App Developer

  • FromPakistan
  • Member sinceJun 2026
  • Avg. response time1 hour

  • Languages

    English
I'm a full-stack mobile developer with 5 years of experience building production-grade apps for iOS and Android. I specialize in Flutter and React Native with Firebase as my primary backend — covering authentication, Firestore, Cloud Functions, push notifications, and file storage. I take projects from zero to live. That includes UI, backend, payment integration, and full store submission on both App Store and Google Play. I also handle store rejections and post-launch support.

My Portfolio

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