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I will react native expo app ios android app store publish firebase supabase convex
Matthew O.
About this gig
Need a React Native Expo developer to build, fix or publish your mobile app?
I develop cross-platform iOS and Android apps using React Native, Expo and TypeScript with Firebase, Supabase, APIs and production-ready deployment.
I can help with:
- React Native Expo app development
- iOS and Android mobile apps
- Expo Router and React Navigation
- Firebase and Supabase integration
- Authentication and OAuth
- REST APIs and webhooks
- Push notifications
- Deep linking and native permissions
- Camera, file upload and device features
- EAS Build and EAS Submit
- APK, AAB and TestFlight builds
- App Store submission
- Google Play publishing
- Expo SDK upgrades and dependency fixes
- React Native and Expo bug fixing
- App crashes and build errors
- Stripe and RevenueCat integration
- Performance optimization
I build new apps and also repair existing React Native or Expo projects that are crashing, failing to build or stuck during publishing.
Send your Figma, existing code or feature list before ordering complex builds so I can recommend the right scope.
Get to know Matthew O.
Matthew O.
Vibecoding Expert AI Web and Mobile App Developer
- FromUnited Kingdom
- Member sinceSep 2026
- Avg. response time1 hour
Languages
English, German, Spanish
I am a Vibecoding Expert and Full Stack Developer specializing in building, improving, migrating, and deploying modern web and mobile applications. I work with Lovable, Replit, Bolt, Base44, Cursor, Supabase, Firebase, Vercel, Netlify, and AWS to turn ideas into reliable production ready products. I also provide website migration, bug fixing, API integration, database development, and targeted backlink outreach for specialized websites. My focus is delivering clean, secure, scalable solutions that are built to perform.
Other Mobile App Development Services I Offer
FAQ
Can you build a full app with React Native and Expo?
Yes. I can build new Android and iOS apps using React Native, Expo and TypeScript.
Do you use Expo?
Yes. Expo is one of my main React Native workflows for cross-platform production apps.
Can you work on an existing Expo project?
Yes. I can continue, debug, upgrade or improve an existing React Native Expo codebase.
Can you fix Expo EAS Build errors?
Yes. I can troubleshoot build profiles, dependencies, credentials, native configuration and Android/iOS build failures.
Can you integrate Firebase?
Yes. I can integrate Firebase Auth, Firestore, Storage, FCM and related services.
Can you use Supabase?
Yes. I can integrate Supabase Auth, PostgreSQL, Storage, Realtime and Edge Functions.
Can you add push notifications?
Yes. I can implement Expo notifications, Firebase Cloud Messaging and Apple notification configuration depending on the project.
Can you publish to Google Play?
Yes. I can prepare the AAB and assist with Google Play Console submission.
Can you publish to the Apple App Store?
Yes. I can prepare the iOS production build, TestFlight and App Store Connect submission.
Can you fix a rejected app?
Yes. Send the rejection notice and I can review and address technical issues that fall within the project scope.
