I will fix flutter app bugs, crashes and errors fast

5.0
5.0

Pakistan

I speak English

20 orders completed

Gig Summary

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

s your Flutter app crashing, freezing, or behaving unexpectedly? Send me the details most issues can be diagnosed within hours.

I'm a Level 2 seller with 5+ years of Flutter experience. I fix bugs properly: I find the root cause, not just the symptom, so the same issue doesn't come back.

I can fix:

  • App crashes, freezes & startup errors
  • UI bugs, layout breaks & responsiveness issues
  • Slow performance, lag & memory leaks
  • Firebase errors (auth, Firestore, notifications)
  • API integration & data-loading failures
  • Payment gateway & Google Maps issues
  • Build & release errors (Android + iOS)

How I work:

  1. You share the issue (and code access)
  2. I diagnose and confirm the exact scope
  3. I fix, test on both platforms, and explain what was wrong

You always get tested code plus a short summary of what caused the issue so you understand your own app better.

Important: Message me before ordering with a description of the problem. This lets me confirm the right package and timeline no surprises for either of us.

Unrelated or newly discovered issues can be added via custom offer.

Platform:

Cross-platforms

App type:

Hybrid

Frameworks:

Flutter

Purpose:

Chat

Social networking

Entertainment

Medical

Expertise:

Cross-browser/Device compatibility

Localization

Programming language:

Dart

Java

JavaScript

Kotlin

Objective-C

Swift

Tools:

Flutterflow

Android Studio

Xcode

Supabase

My Portfolio

Reviews

11 reviews for this Gig
5.0

(11)
(0)
(0)
(0)
(0)
Rating Breakdown
  • Seller communication level
    5
  • Quality of delivery
    5
  • Value of delivery
    5
Sort By
Most relevant
  • Y

    yutish09

    MU

    Mauritius

    Ongoing collaboration
    5

    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.

    $100-$200

    Price

    1 day

    Duration

    Helpful?
    Yes
    No
  • R

    robertacwebster

    US

    United States

    5

    Umair did an excellent job! Good communication and high-quality work. Highly recommend him for app development!.

    $50

    Price

    3 days

    Duration

    Helpful?
    Yes
    No
  • K

    kateju84

    US

    United States

    Ongoing collaboration
    5

    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

    Helpful?
    Yes
    No
  • K

    kateju84

    US

    United States

    Ongoing collaboration
    5

    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?
    Yes
    No
  • A
    image-docs

    alexandrusir728

    ES

    Spain

    Ongoing collaboration
    5

    I use his services very often, and I am happy with his work. I highly recommend him.

    $100-$200

    Price

    Helpful?
    Yes
    No
Reviews

11 reviews for this Gig
5.0

(11)
(0)
(0)
(0)
(0)
Rating Breakdown
  • Seller communication level
    5
  • Quality of delivery
    5
  • Value of delivery
    5
Sort By
Most relevant
  • Y

    yutish09

    MU

    Mauritius

    Ongoing collaboration
    5

    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.

    $100-$200

    Price

    1 day

    Duration

    Helpful?
    Yes
    No
  • R

    robertacwebster

    US

    United States

    5

    Umair did an excellent job! Good communication and high-quality work. Highly recommend him for app development!.

    $50

    Price

    3 days

    Duration

    Helpful?
    Yes
    No
  • K

    kateju84

    US

    United States

    Ongoing collaboration
    5

    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

    Helpful?
    Yes
    No
  • K

    kateju84

    US

    United States

    Ongoing collaboration
    5

    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?
    Yes
    No
  • A
    image-docs

    alexandrusir728

    ES

    Spain

    Ongoing collaboration
    5

    I use his services very often, and I am happy with his work. I highly recommend him.

    $100-$200

    Price

    Helpful?
    Yes
    No