I will fix your react native app and publish to app store

B
bobemerald
B
bobemerald
Mikolaj G
fix your react native app and publish to app store
Full Screen
fix your react native app and publish to app store
Full Screen
Full Screen
fix your react native app and publish to app storefix your react native app and publish to app storefix your react native app and publish to app store

About this gig

I will build, fix, test, and release your mobile app for iOS and Android.


I specialize in React Native, Expo, Flutter, Swift, Kotlin, Firebase, Supabase, Node.js, PostgreSQL, Stripe, RevenueCat, and app store deployment.


This gig is best for clients who already have an app, MVP, design, or idea and need help turning it into a stable, production-ready product.


I can help with:

- React Native, Expo, or Flutter app development

- iOS and Android bug fixing

- App Store and Google Play release

- Firebase or Supabase integration

- API integration

- Login/authentication

- Stripe, RevenueCat, and in-app purchases

- Performance optimization

- Build errors and deployment issues

- Backend API development

- Admin dashboard or web app integration


Before starting, I will review your app, requirements, design, or existing codebase and explain what needs to be done clearly.


Please contact me before placing an order so I can confirm the scope, timeline, and best package for your project.

  • App type

    • Native

  • Programming language

    • Kotlin
    • Swift
    • TypeScript
    • React Native
    • Flutter

  • Frameworks

    • Flutter
    • SwiftUI
    • Node.js
    • React Native

  • Purpose

    • Chat
    • Shopping
    • Social networking
    • Entertainment
    • Health & fitness
    • Maps & navigation
    • News
    • Travel
    • Custom
    • Ecommerce

  • Tools

    • Flutterflow
    • Expo
    • Android Studio
    • Xcode
    • Firebase
    • Supabase

  • Expertise

    • Cross browser/Device compatibility
    • Performance
    • Security
    • Firebase
    • API integration
    • Compatibility

Get to know Mikolaj G

Mikolaj G

Mikolaj Gramowski

5.0(5)
  • FromPoland
  • Member sinceJun 2020
  • Last delivery5 years

  • Languages

    English, Polish
Full Stack Web & Mobile Developer specializing in React Native, Expo, Flutter, Swift, Next.js, Node.js, Firebase, Supabase, PostgreSQL, Stripe, and AWS. I build and take over mobile apps, web apps, SaaS platforms, MVPs, admin dashboards, marketplaces, AI-powered apps, and subscription based products. I can help with app development, backend APIs, payment integrations, bug fixing, performance optimization, deployment, and App Store / Google Play release. I focus on clean code, clear communication, and reliable products that are ready for real users.

My Portfolio

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