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QuickTopups Mobile — Cross-Platform Payment App
React Native / NestJSFinTech / Mobile Payments

QuickTopups Mobile — Cross-Platform Payment App

Built the iOS and Android companion app for QuickTopups, bringing full recharge, voucher, and payment functionality to mobile users via React Native and NestJS.

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Product Screenshots

QuickTopups Mobile — Cross-Platform Payment App screenshot
QuickTopups Mobile — Cross-Platform Payment App screenshot
QuickTopups Mobile — Cross-Platform Payment App screenshot
QuickTopups Mobile — Cross-Platform Payment App screenshot
QuickTopups Mobile — Cross-Platform Payment App screenshot

Project Description

With QuickTopups already processing high-volume transactions through web and banking integrations, the business needed a native mobile experience so users could recharge, pay bills, and redeem vouchers on the go. The mobile app had to match the web platform's full feature set while delivering a smooth, app-store-ready experience on both iOS and Android.

I developed QuickTopups Mobile as a cross-platform React Native application backed by a NestJS API layer. The app brings complete parity with the web platform: mobile recharge, voucher management, bill payments, and transaction history — optimized for mobile UX patterns.

On the backend, NestJS provides a structured, scalable API with clear module boundaries for authentication, payments, vouchers, and transaction history. The architecture mirrors the web platform's payment orchestration while adding mobile-specific concerns such as token-based auth and optimized payload sizes.

Technical challenges included maintaining feature parity across iOS and Android from a single React Native codebase, ensuring secure payment flows on mobile devices, and building a NestJS backend that could serve both the mobile app and existing web infrastructure.

My Role

  • Developed the cross-platform React Native mobile application (iOS & Android)
  • Built the NestJS backend API with modular service architecture
  • Implemented mobile recharge, voucher, and bill payment features
  • Designed secure authentication and session management for mobile clients
  • Ensured feature parity with the QuickTopups web platform
  • Optimized API responses and mobile UX for on-the-go transactions

Technologies Used

Frontend

React NativeiOSAndroidMobile UI/UX

Backend

NestJSTypeScriptModular API Architecture

Database

MongoDBUser & Transaction Storage

APIs & Integrations

Payment APIsVoucher APIsMobile Auth Endpoints

Cloud & Deployment

App Store DeploymentProduction API Hosting

Tools

GitXcodeAndroid StudioPostman

Skills

React NativeNestJSMobile App DevelopmentiOS DevelopmentAndroid DevelopmentCross-Platform DevelopmentAPI DevelopmentTypeScriptFinTechPayment IntegrationFull-Stack DevelopmentMobile UXBackend ArchitectureJavaScriptProduction Mobile Apps

Key Features

  • Cross-platform iOS and Android delivery
  • Mobile recharge and instant top-ups
  • Bill payment processing on mobile
  • Voucher redemption and management
  • Transaction history and account management
  • Secure mobile authentication
  • NestJS modular backend API
  • Feature parity with web platform

Technical Challenges Solved

  • Maintained iOS/Android parity from a single React Native codebase with platform-specific modules where needed.
  • Built secure token-based mobile auth with session refresh for uninterrupted payment flows.
  • Designed NestJS modules to share payment logic with the existing web backend without duplication.

Results & Impact

✓

Extended QuickTopups reach to mobile app store channels

✓

Delivered full payment functionality on iOS and Android from a single codebase

✓

Reduced development and maintenance cost via cross-platform architecture

✓

Improved user convenience with on-the-go recharge and bill payment

Industry

FinTech / Mobile Payments

Portfolio Summary

Cross-platform mobile app for Pakistan's QuickTopups payment platform — React Native frontend with NestJS backend, delivering recharge, vouchers, and bill payments on iOS and Android.

SEO Keywords

React Native developermobile fintech appNestJS developercross-platform mobileiOS Android developerpayment mobile appdigital wallet appfreelance mobile developerfintech mobilebill payment appvoucher mobile appTypeScript backendmobile API developmentapp store deploymentPakistan fintechfull stack mobile developerReact Native fintechmobile recharge appproduction mobile appsecure mobile payments

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