I need an experienced Flutter developer to fix issues in my existing Flutter mobile app.App details:• The app is already built in Flutter.• APK builds successfully but OTP verification is not working.• Firebase OTP authentication needs to be fixed.•

@Rajoriadares

Hello Client, Greeting of the day!!!! I read your job description I have sound of five years plus experience in App development. I have been DEVELOPED 35+ Apps, three taxi apps, Two socials apps and restaurant apps based on GPS location and notification functionality and based on different domain like sports, Health, GYM, personal business and social etc I have testing team for testing apps. I think I am strongest person for doing this job and provide the quality product with testing. I am always available for your support. Thanks Sr. Mobile Developer

@AZTURK1

Hi there, I understand your Flutter app builds an APK but Firebase OTP auth isn't sending codes; I will diagnose Flutter + Firebase Auth + Firestore integration and fix the Android build/signing issues that block SMS delivery. My background in mobile deployment, Android Studio and backend integrations makes me a precise fit. - Reproduce the failure on Android (logcat, Firebase debug) and fix Firebase Authentication configuration and SHA‑1/SHA‑256 fingerprints. - Correct code paths in Flutter auth flow, update firebase_auth usage and reconfigure phone verification for Android (APIs, Play services). - Test end-to-end OTP send/receive on multiple devices; verify Firestore rules and auth linkage. - Risk control: staged fix, rollback-ready commit, post-fix validation steps and logging added to avoid regressions. Skills: ✅ Flutter ✅ Firebase Authentication / Firestore ✅ Android Studio / Android SDK ✅ APK signing / Play services / deployment ✅ Debugging, logging, rollback, security hardening ✅ (optional) PHP backend hooks if used Certificates: ✅ Microsoft® Certified: MCSA | MCSE | MCT ✅ cPanel® & WHM Certified CWSA-2 I'm available to start immediately. Do you have the Firebase project access and Android SHA-1/SHA-256 fingerprints (or do you want me to add them if you grant access)? Thanks,

@mutahrar

Hello, I have extensive experience working with Firebase Authentication and Firestore, including implementing OTP-based phone authentication across Android, iOS, and web applications. I can help troubleshoot why OTPs are not being sent by reviewing your current Firebase configuration, verifying reCAPTCHA implementation, checking SHA fingerprints (for Android), and ensuring phone authentication is properly enabled in the Firebase console. My approach includes step-by-step debugging to identify configuration errors, network issues, or quota limitations that may prevent OTP delivery. In addition, I can guide you through best practices for Firebase OTP implementation, including setting up test phone numbers, validating input formats, and ensuring your app communicates with the correct Firebase project. The goal is to restore reliable OTP functionality and ensure smooth authentication for your users without requiring major changes to your existing setup.

@bhartimalu

Hello, I can help you fix the OTP verification issue in your Flutter app. - I have extensive experience with Flutter and Firebase, having resolved similar issues in past projects. - My plan includes: 1. Reviewing your current implementation. 2. Debugging the OTP flow. 3. Testing the solution thoroughly. - I use Flutter, Firebase Authentication, and Firestore for seamless integration. - I can deliver results within a week, with regular updates to keep you informed. Choose me for my proven track record and commitment to quality. What specific errors are you encountering with OTP? Are there any other features you want to improve? Regards, Bharti M.

@dushyant317

I have over 13 years of professional experience working on similar projects and have strong expertise in the required technologies. I focus on delivering high-quality, scalable, and reliable solutions while maintaining clear communication and meeting deadlines. My experience across multiple complex projects allows me to quickly understand client requirements and implement efficient solutions. I am confident that my skills and proven track record will help deliver excellent results for your project.

@indreshpnk

Hello, I understand you need an experienced Flutter developer to fix Firebase OTP authentication in your mobile app. The goal is to deliver a fully functional, reliable, and smooth OTP login experience for your users. Here’s what I can provide: Firebase OTP Fix – resolve OTP sending and verification issues to ensure secure user login. Flutter & Firebase Optimization – check configuration, update dependencies, and fix any integration bugs. App Stability & Testing – thorough testing on Android devices to ensure OTP works consistently across scenarios. I bring over 4+ years of experience in Flutter, Firebase, and mobile app development, building scalable and user-friendly apps. I’ve handled authentication and OTP-based systems for several mobile applications, ensuring reliability and smooth performance. Just to clarify a few things: Are you using phone number authentication only, or email login as well? Do you want me to also check Firestore integration while fixing OTP issues? Please come to the chat box to discuss more about your project. Best regards, Indresh Kushwaha

@dodywicaksono

I am thrilled to help you resolve your Firebase OTP issue and get your authentication flow running perfectly again. Since your APK builds but messages aren't sending, I will immediately audit your SHA-1/SHA-256 fingerprints in the Firebase Console and check for any missing Google Cloud API permissions. I can start working on your project right now and will provide you with live progress updates every few hours. My approach involves verifying your Firebase configuration files and testing the SMS gateway to ensure reliable delivery across all devices. I estimate completing this fix and delivering a fully functional build within 2 days. Let's hop on a quick chat so I can see your current setup and get this fixed for you today!

@ruthikshaIt

hii sir i am a flutter developer i can fix this issue by debugging your app so connect with me i already. implement in many application so connect with me i can do very fast this task

@rakishthulung

I’ve built live apps like Hajir and Dialinger using clean code. I’m new here but have years of real-world Flutter/Firebase experience. I’ll use Isolates for smooth TFLite performance on mid-range Androids.

@vinodrayka07

Hello, I can help fix the Firebase OTP authentication issue in your Flutter app. I have been working with Flutter and Firebase since 2020, and I have implemented Firebase Authentication, OTP verification, and Firestore integration in several production apps. If the OTP is not being sent, the issue is usually related to Firebase phone authentication configuration, SHA key setup, reCAPTCHA verification, or API restrictions. I can review your project, check the Firebase console settings, authentication configuration, and Flutter implementation, and quickly identify the root cause. I will ensure that OTP sending, verification, and user authentication work correctly on real devices and emulators. I can also check Firestore integration to make sure everything functions smoothly after login. Please share your project code or GitHub repository along with Firebase configuration details so I can review it and resolve the issue quickly. I’m confident I can fix this problem and also help improve the authentication flow for better reliability in the future. Best regards, Vinod Flutter Developer