I will mobile app development android app ios flutter react native fintech app creation

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Usman Sarwar
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mobile app development android app ios flutter react native fintech app creation
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Over deze dienst

Are you looking for a senior React Native developer who can build your complete iOS & Android app?



I'm Usman Sarwar, a full-stack mobile app developer with 7+ years of production experience.


What I Do Best



  • Full-stack React Native development
  • iOS & Android single codebase, both stores
  • Fintech, payments & real-time app flows
  • AI-assisted development for faster delivery


UI/UX & Frontend


  • Clean, intuitive interfaces users actually enjoy

Backend & Integrations

  • REST API & GraphQL integration
  • Firebase, Firestore & real-time databases
  • Stripe & payment gateway integration
  • Third-party SDK & API integration



Services I Offer

  • Complete iOS & Android app development
  • Frontend + backend full-stack solutions
  • App UI/UX design & prototyping
  • App modernization & redesign
  • Bug fixing, maintenance & performance tuning
  • Mobile Development
  • Flutter Apps
  • React Native
  • Fintech Apps

Apps I've worked on:

  • Chat
  • Dating
  • Delivery
  • Shopping
  • Taxi
  • Booking
  • Social networking
  • Entertainment
  • Medical
  • Health & fitness
  • custom app

My goal isn't just to write code it's to deliver a working product that supports your businessHigh-quality work at a competitive starting price as I expand my Fiverr presence.

lets start!


  • App-type

    • Hybride

  • Programmeertaal

    • Dart
    • Delphi (Object Pascal)
    • Java
    • JavaScript
    • PHP
    • Python
    • TypeScript
    • HTML
    • React Native
    • Flutter

  • Frameworks

    • Flutter
    • Ionisch
    • nativescript
    • Node.js
    • React Native

  • Doel

    • Chat
    • dating
    • Restaurant
    • Financiën
    • Medisch
    • Kaarten en navigatie
    • Educatie
    • Crypto
    • Op maat
    • Wallet app

  • Tools

    • Flutterflow
    • Expo
    • Android Studio
    • Xcode
    • firebase
    • Visual Studio Code
    • Visual Studio

  • Expertise

    • Compatibiliteit tussen browsers en apparaten
    • Beveiliging
    • Advertenties en inkomsten genereren
    • firebase
    • API integratie
    • Compatibiliteit

Maak kennis met Usman Sarwar

Usman Sarwar

Lead Mobile App Engineer

  • Afkomstig uitPakistan
  • Lid sindsapr 2026
  • Gem. reactietijd2 uur

  • Talen

    Engels, Duits
I am Usman Sarwar—a software engineer and mobile application developer with 7+ years building large-scale, SaaS-style products. I am especially strong in React Native (iOS & Android), with deep work in payments, fintech flows, PAX / POS hardware, and real-time systems (MQTT, sockets). I also ship web stacks where the product needs them, and I use AI-assisted engineering thoughtfully—agents, LLMs, and modern tooling—with review, security, and maintainability.

Mijn portfolio

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