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I will develop a react native mobile app for ios and android with expo
Jose Campos
About this gig
You need a real mobile app, not a Flutter clone or a cheap WebView. I build production React Native apps that ship.
I am a senior mobile developer with 9+ years of experience including the Banco do Brasil Insurance app and Celler Bank fintech app both shipped to App Store and Play Store with millions of users.
WHAT YOU GET:
- Cross-platform iOS + Android from one codebase
- Native performance (RN + Expo Development Builds)
- Custom UI matching your brand
- Authentication (JWT, biometric, OAuth)
- Push notifications
- Offline mode + local storage
- API integration (REST or GraphQL)
- App Store + Play Store submission
TECH STACK:
- React Native + Expo
- TypeScript
- Zustand / Redux Toolkit
- React Navigation
- Reanimated for smooth animations
- EAS Build + Submit
APPS I HAVE SHIPPED:
- Banco do Brasil Insurance millions of users
- Celler Bank fintech mobile app
- EnglishCraft language learning (iOS + Android + Web)
- Multiple MVPs across software houses
WHY ME:
- 9+ years specializing in mobile
- Bank-grade reliability standards
- Apple + Google account experience
- Direct, no-fluff English communication
BEFORE ORDERING:
Share your app idea or Figma. I respond within 1 hour wit
Get to know Jose Campos
Jose Campos
Senior FullStack and AI Engineer 9 years RAG, MVPs, React Native
- FromBrazil
- Member sinceFeb 2022
- Avg. response time2 hours
- Last delivery3 years
Languages
English, Portuguese
I am Jose — senior software engineer with 9+ years of production experience.
I build AI applications, mobile apps, and full-stack MVPs that ship — not throwaway demos. Recent work: a RAG document chatbot live in production (FastAPI + Qdrant + Gemini), Banco do Brasil insurance app (millions of users), Celler Bank fintech, EnglishCraft language platform.
I run end-to-end: frontend, backend, DevOps. No team coordination needed.
What you get:
- 1-hour first response, even on weekends
- Production code with full source ownership
- Direct English / Portuguese communication
FAQ
Why React Native and not Flutter?
RN has wider ecosystem, easier to hire developers, larger library coverage. Apps look identical to native. I have shipped both — RN wins for most business apps.
Will you submit to App Store and Play Store?
Yes (Standard+). I have shipped multiple apps to both stores including bank apps.
What about backend?
If you need a backend, see my MVP gig — I do full-stack. Or I integrate with your existing API.
Can you do native modules in Swift/Kotlin?
Yes. For features RN does not cover natively, I write the bridge in Swift/Kotlin/Java.
Do you handle Apple Developer / Google Play accounts?
Yes. I help configure your accounts, generate certificates, and submit. Your accounts, your apps — I just operate them.
