I will fix flutter app bugs, flutter bugs, flutter fixes, UI bugs

C
code_onyx
C
code_onyx
Onyx C
fix flutter app bugs, flutter bugs, flutter fixes, UI bugs
Full Screen
fix flutter app bugs, flutter bugs, flutter fixes, UI bugs
Full Screen
Full Screen
fix flutter app bugs, flutter bugs, flutter fixes, UI bugsfix flutter app bugs, flutter bugs, flutter fixes, UI bugsfix flutter app bugs, flutter bugs, flutter fixes, UI bugs

About this gig

Hi! I'm a Senior Flutter Developer with 5+ years of experience and 50+ apps delivered, backed by a 5-star review. I specialize in fixing Flutter app bugs, optimizing performance, and building stunning apps with clean code. Lets make your app flawless!

Bug Fixing & Maintenance:

  • Fix Flutter bugs (UI, crashes, logic errors)
  • Resolve UI issues for pixel-perfect, responsive designs
  • Optimize app performance for speed & smoothness
  • Refactor messy code for scalability
  • Add features & integrate APIs (REST, GraphQL)
  • Add payment gateways (Stripe, PayPal, etc.)

App Development:

  • Build modern UI with smooth animations
  • Integrate Firebase, Node.js, or Spring Boot backends
  • Set up Firestore, Real-Time DB & Cloud Functions
  • Add push notifications & in-app purchases
  • Integrate Google Analytics & AdMob ads
  • Submit to App/Play Store with 1-month support

Why Me?

  • 4+ yrs in Flutter, 50+ apps (eCommerce, social, AI, crypto)
  • Proven 5-star quality & fast delivery
  • Clear communication & long-term support

Get Started!

  • Message me to fix bugs or build your app. Lets boost your apps success!


  • Programming language

    • Dart

  • Expertise

    • Localization
    • Performance
    • Design
    • Databases

  • Frontend framework

    • Flutter

  • Backend framework

    • Laravel
    • CodeIgniter
    • Node.js

Get to know Onyx C

Onyx C

Software Engineer

  • FromPakistan
  • Member sinceApr 2026
  • Avg. response time1 hour

  • Languages

    English, Spanish, French, German
I am a Flutter developer with experience at Stack Buffers, E-Mcs, Ivy Interative Solutions, and Sigma Digital Solutions. I have worked on various projects involving Firebase, Google Maps, and API integrations.

My Portfolio

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