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I will integrate firebase, API, or google play billing in flutter
Senith
About this gig
Need Firebase, API, FCM, or Google Play Billing added to your Flutter app?
I can help connect your Flutter app to the systems behind it: authentication, database, push notifications, REST APIs, Google Sign-In, and Google Play Billing.
I can help with:
- Firebase project setup
- Firebase Auth login/signup
- Google Sign-In
- Firestore database integration
- Firebase Cloud Messaging / push notifications
- REST API integration
- Google Play Billing / subscriptions
- Crashlytics and Analytics setup
- Android package name, SHA, and config issues
- Fixing broken Firebase or billing setup
Relevant work:
- Built Orderly with Firebase, local database, licensing, and Google Play Billing
- Built BetterTrade with Firebase Auth, Firestore, Analytics, Crashlytics, and App Check
- Worked on production fintech, POS, and business apps with real users
How I work:
- Review your current app and setup
- Confirm the integration flow
- Add or fix the required setup
- Test the affected flow
- Explain what changed
Please message me before ordering so I can check your current app state and suggest the right package.
Get to know Senith
Senith
Flutter Mobile App Developer
- FromSri Lanka
- Member sinceMay 2026
- Avg. response time1 hour
Languages
Sinhala, English
I build, fix, and improve Flutter mobile apps for Android and iOS.
I work with MVPs, Firebase apps, offline-first systems, app fixes, Google Play Billing, performance cleanup, and production-ready mobile workflows.
I have 3+ years of real production experience, including a wallet with 10K+ users, a POS system used by 100+ business clients, and my own apps Orderly and BetterTrade live on Google Play.
Send me your app idea, codebase, or issue. I’ll tell you the cleanest way to handle it.
My Portfolio
FAQ
What integrations can you add?
I can add Firebase Auth, Firestore, FCM, REST APIs, Google Sign-In, Google Play Billing, and basic backend-connected app flows.
What do you need to start?
I need your Flutter project, Firebase/API details, expected app flow, screenshots/designs if available, and access/config files after order starts.
Can you set up Firebase from scratch?
Yes. I can connect Firebase to your Flutter app and set up basic services depending on the package.
Can you add login and signup?
Yes. I can add Firebase Auth login/signup, Google Sign-In, and basic user data flow.
Can you add push notifications?
Yes. I can integrate Firebase Cloud Messaging for Android and iOS depending on your app setup.
Can you integrate Google Play Billing?
Yes. I can integrate or fix Google Play Billing flows for one-time purchases or subscriptions.
Can you connect my app to an API?
Yes. I can connect REST APIs, handle requests/responses, and display the data in the app.
Do you create the API/backend?
This gig mainly covers integration. Simple Firebase/backend setup is possible, but custom backend development needs a custom offer.
Do you test the integration?
Yes. I test the affected flow and make sure the integration works based on the agreed scope.
Is setup documentation included?
A short setup note can be included depending on the package or added as an extra.
