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$
USD
I will fix flutter app bugs, crashes, errors, and performance optimization
Flutter Mobile App and Backend Development Expert
Hi, I'm Umair Saleem, a Senior Full-Stack Developer with 5+ years of experience building scalable web and mobile applications.
I specialize in React, Node.js, MongoDB, PostgreSQL, Next.js, and Flutte...
About this Gig
Is your Flutter app crashing, running slow, or not behaving as expected?
I help startups, entrepreneurs, and businesses fix bugs, optimize performance, and troubleshoot Flutter apps for both Android and iOS.
With 5+ years of Flutter experience, I dont just fix errors I make your app stable, smooth, and production-ready.
What I Can Fix & Optimize For You
- Debugging Flutter app crashes & errors
- Resolving UI & UX issues
- Optimizing app performance & speed
- Firebase & API integration troubleshooting
- Fixing In-App Payment or Google Maps errors
- Extending existing Flutter apps with fixes
- Multi-device testing for stability
My Approach to Bug Fixing
- Analyze issues and provide clear solution plans
- Clean, maintainable, and stable code
- Optimized performance and smooth user experience
- Professional testing across devices
- Reliable communication & fast delivery
Why Work With Me?
- 5+ Years Flutter & Mobile App Experience
- Expert in UI, backend, Firebase & API issues
- Focused on delivering stable and maintainable apps
- Unlimited revisions until youre satisfied
- Post-fix consultation and guidance
Before placing an order, please send me a message with your app details and the issues so we can discuss the
My Portfolio
FAQ
What are you offering in your 'Basic' Package?
Simple mobile app with 5 to 8 screen design as per your demand, admin panel and backend in firebase.
What are you offering in your 'Standard' Package?
App consist of 10 screens with custom design, admin panel and backend in firebase.
What are you offering in your 'Premium' Package?
App consist of screens up to 12 having complete admin panel, backend in firebase & advanced features
Reviews
11 reviews for this Gig
| (11) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
Y yutish09
Repeat Client
Mauritius
Very good experience. Umair was exceptional nice to make any type of amendments. He went beyond and above to add new features to my app and was very keen to be invested in my app. Would definitely order again from him.
$50-$100
Price
1 day
Duration
U 
Seller's Response
Helpful?R robertacwebster
United States
Umair did an excellent job! Good communication and high-quality work. Highly recommend him for app development!.
Up to $50
Price
3 days
Duration
U Seller's Response
Helpful?K kateju84
Repeat Client
United States
Umair is very hard working. He is very knowledgeable and digs deep to understand requirements. We will make more orders! Quality work and great communication!
$200-$400
Price
4 weeks
Duration
U Seller's Response
Helpful?K kateju84
Repeat Client
United States
We completed front end with Umair. The communication is excellent. It is very important for us to know that after submitting the order a person has a constant progress with it. He shared with us intermediate progress. So far we are very happy! He is knowledgeable and hard working. We are ordering back end now.
$200-$400
Price
8 days
Duration
Helpful?A 
alexandrusir728
Repeat Client
Spain
I use his services very often, and I am happy with his work. I highly recommend him.
U Seller's Response
Helpful?
Reviews
11 reviews for this Gig
| (11) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
Y yutish09
Repeat Client
Mauritius
Very good experience. Umair was exceptional nice to make any type of amendments. He went beyond and above to add new features to my app and was very keen to be invested in my app. Would definitely order again from him.
$50-$100
Price
1 day
Duration
U Seller's Response
Helpful?R robertacwebster
United States
Umair did an excellent job! Good communication and high-quality work. Highly recommend him for app development!.
Up to $50
Price
3 days
Duration
U Seller's Response
Helpful?K kateju84
Repeat Client
United States
Umair is very hard working. He is very knowledgeable and digs deep to understand requirements. We will make more orders! Quality work and great communication!
$200-$400
Price
4 weeks
Duration
U Seller's Response
Helpful?K kateju84
Repeat Client
United States
We completed front end with Umair. The communication is excellent. It is very important for us to know that after submitting the order a person has a constant progress with it. He shared with us intermediate progress. So far we are very happy! He is knowledgeable and hard working. We are ordering back end now.
$200-$400
Price
8 days
Duration
Helpful?A alexandrusir728
Repeat Client
Spain
I use his services very often, and I am happy with his work. I highly recommend him.
U Seller's Response
Helpful?
