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I will integrate rest API into flutter react native app backend data connection service
Robert Williams
About this gig
Need to connect your mobile app to a REST API or backend? I can integrate REST APIs into Flutter and React Native applications to help your app exchange data reliably. My API integration service can include:
- REST API connection and HTTP requests
- JSON parsing and data models
- Login and API authentication
- Bearer tokens and authorized requests
- GET, POST, PUT and DELETE requests
- Loading indicators and error handling
- List views, forms and data display
- Pagination for supported APIs
- Testing and integration troubleshooting
Whether you are building a business app, booking app, ecommerce app, dashboard or MVP, I will work within your existing project and API documentation. Before ordering, please share your app framework, API documentation, required endpoints, authentication method and expected results. I will review the scope and confirm the package that fits your needs. Complex backend changes, undocumented APIs, third-party service issues, major app redesigns and extensive new features may require a custom offer.
My goal is to deliver a clear, maintainable integration with appropriate error handling and testing. CONTACT NOW !!!
Get to know Robert Williams
Robert Williams
Expert Flutter React Native Developer UI UX Firebase Integration
- FromUnited States
- Member sinceOct 2026
- Avg. response time9 hours
Languages
English, German, Italian
Professional Flutter & React Native Developer specializing in high-performance cross-platform mobile apps for Android and iOS. I turn Figma UI/UX designs into pixel-perfect, responsive mobile interfaces and build robust backends with Firebase Auth, Firestore, and Cloud Messaging.
Whether you need to integrate complex REST APIs, fix critical app bugs, resolve Android build issues, or deploy real-time features, I deliver clean, scalable code on time. Let's bring your mobile app vision to life—send a message to get started!
My Portfolio
FAQ
Can you integrate a REST API into a Flutter app?
Yes. I can integrate REST APIs into existing React Native applications using the appropriate networking approach for the project.
Do you support React Native API integration?
Yes. I can integrate REST APIs into existing React Native applications using the appropriate networking approach for the project.
Can you connect login and registration APIs?
Yes. I can integrate authentication endpoints and handle responses, tokens and relevant error states according to the API documentation.
Can you integrate GET, POST, PUT and DELETE requests?
Yes. I can implement the HTTP methods supported by your API and required for your application.
Can you fix API connection errors?
Yes. I can investigate request failures, response parsing, authentication problems and other integration issues within the agreed scope.
Do you work with JSON data?
Yes. I can parse JSON responses, create suitable data models and connect the returned information to your app interface.
Can you connect an API to an existing mobile app?
Yes. Share the relevant project files and API documentation so I can assess how the integration fits your existing code.
Do you build the backend API too?
This gig focuses on integrating existing APIs. New backend development can be discussed and quoted separately.
What do you need before starting?
I need your project framework, API documentation, required endpoints, authentication details and expected functionality.
Will you test the API integration?
Yes. I will test the agreed functionality in the available environment and report any issues that depend on external services or access.
