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$
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I will fix flutter bugs, firebase errors and add app localization
Flutter and Firebase App Developer for Mobile
🚀 Senior Flutter Developer with 6+ years of experience. I build high-performing cross-platform apps for Android, iOS, Web, and Desktop. Native performance with a single codebase, saving you time and ...
What people loved about this freelancer
mahdi_moheb
Afghanistan
Had a really laggy mobile application what didn't know what to do. Sharif fixed if within a single day🤯! Really got surprised! will definitely order more from...
kingmammad
Afghanistan
Excellent work! The seller was professional, responsive, and delivered exactly what I needed. The quality of the work was great, and everything was completed...
kingmammad
Afghanistan
Excellent service from Sharif! He was professional, responsive, and quickly fixed all the bugs I was facing. Everything is now working smoothly and exactly...
About this Gig
⭐ Is your Flutter app crashing? Are your Firebase queries failing? Don't worry! I am here to fix all your Flutter bugs, resolve Firebase errors, and add multi-language support professionally and fast.
With 6+ years of Flutter development experience, I specialize in debugging, fixing crashes, and optimizing apps to ensure a perfect user experience.
⭐ What I Offer:
Deep App Debugging: Identify and resolve crashes, build errors, dependency conflicts, and state management issues.
Firebase Error Fixing: Troubleshoot Firestore, Authentication, Cloud Functions, and Realtime Database errors.
App Localization: Add multi-language support with easy language switching and RTL support for global audiences.
Performance Tuning: Optimize code for faster speed, smooth animations, and reduced APK size.
⭐ Why Choose Me?
6+ years of expert Flutter & Firebase development
24-hour fast delivery with clean, stable source code
100% client satisfaction guaranteed
Let's make your app bug-free, global, and high-performing.
Message me now before ordering to discuss your app issues!
My Portfolio
Other Mobile App Maintenance Services I Offer
FAQ
What types of bugs or crashes can you fix?
I specialise in comprehensive app debugging for all Android applications. I can fix runtime crashes, memory leaks, Gradle build errors, dependency conflicts, UI layout issues, and broken AI mobile app features or OpenAI/Gemini API integration errors
Do you need the source code or just the APK?
To perform a complete android app errors analysis and implement permanent fixes, I will need your complete Android Studio source code (.zip file) or repository access. An APK is only helpful for initial bug reproduction, but code access is required for app maintenance.
Will you update my app to meet Play Store requirements?
Yes, absolutely! I can update android app structures to comply with the latest Google Play Console guidelines. This includes upgrading your project to the target API
How long does it take to fix my app?
For simple android bug fix requests or minor UI adjustments, I offer super-fast 24-hour delivery. Complex runtime crashes, database errors, or advanced AI app development debugging might take 2 to 3 days depending on the project scope.
Can you add multi-language support (localization) to my existing Flutter app?
Yes, absolutely. I can add full multi-language support to your Flutter app using popular packages like easy_localization, GetX, or the official flutter_localizations with ARB/JSON files. I support any language – English, Arabic, Spanish, French, Urdu, etc.
Do you provide a report after fixing the app?
Yes, every delivery includes a detailed app debugging and resolution report. It explains exactly what caused the crashes or errors, how they were resolved, and tips on how to maintain your application's performance in the future.
Do I need to provide translation files, or will you handle everything?
You can provide your own translations (JSON, ARB, or CSV), or I can set up the entire localization structure for you. I’ll integrate the package, configure language switching, and leave placeholders or sample keys so you or a translator can easily add text in any language later.
Reviews
4 reviews for this Gig
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
M 
mahdi_moheb
Afghanistan
Ongoing collaborationHad a really laggy mobile application what didn't know what to do. Sharif fixed if within a single day🤯! Really got surprised! will definitely order more from him :) The code quality also was exceptional! Highly recommended for bug fixing of flutter projects!
$50
Price
1 day
Duration
Helpful?K 
kingmammad
Afghanistan
Ongoing collaborationExcellent work! The seller was professional, responsive, and delivered exactly what I needed. The quality of the work was great, and everything was completed on time. I’m very satisfied with the result and would definitely recommend this seller to others. Great experience overall!
$50
Price
1 day
Duration
Helpful?K kingmammad
Afghanistan
Ongoing collaborationExcellent service from Sharif! He was professional, responsive, and quickly fixed all the bugs I was facing. Everything is now working smoothly and exactly as expected. The work was completed on time, and I’m very satisfied with the result. I would definitely recommend Sharif for reliable and high-quality bug fixing!
$50
Price
1 day
Duration
Helpful?V 
voltaireconsult
United States
Ongoing collaborationWorking with Sharif is always a pleasure! He works fast and always does a great job. I am rehiring for more work. He is highly recommended and a great person to work with.
$50
Price
2 days
Duration
Helpful?
Reviews
4 reviews for this Gig
| (4) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
M mahdi_moheb
Afghanistan
Ongoing collaborationHad a really laggy mobile application what didn't know what to do. Sharif fixed if within a single day🤯! Really got surprised! will definitely order more from him :) The code quality also was exceptional! Highly recommended for bug fixing of flutter projects!
$50
Price
1 day
Duration
Helpful?K kingmammad
Afghanistan
Ongoing collaborationExcellent work! The seller was professional, responsive, and delivered exactly what I needed. The quality of the work was great, and everything was completed on time. I’m very satisfied with the result and would definitely recommend this seller to others. Great experience overall!
$50
Price
1 day
Duration
Helpful?K kingmammad
Afghanistan
Ongoing collaborationExcellent service from Sharif! He was professional, responsive, and quickly fixed all the bugs I was facing. Everything is now working smoothly and exactly as expected. The work was completed on time, and I’m very satisfied with the result. I would definitely recommend Sharif for reliable and high-quality bug fixing!
$50
Price
1 day
Duration
Helpful?V voltaireconsult
United States
Ongoing collaborationWorking with Sharif is always a pleasure! He works fast and always does a great job. I am rehiring for more work. He is highly recommended and a great person to work with.
$50
Price
2 days
Duration
Helpful?
