I will fix, refactor, and modernize your ios legacy app

V
voltec366
V
voltec366
Mikhail M
fix, refactor, and modernize your ios legacy app
Full Screen
fix, refactor, and modernize your ios legacy app
Full Screen
Full Screen
fix, refactor, and modernize your ios legacy appfix, refactor, and modernize your ios legacy appfix, refactor, and modernize your ios legacy app

About this gig

Need help fixing, refactoring, or modernizing an existing iOS app?


I'm a senior iOS engineer with 14+ years of production experience in Swift, SwiftUI, UIKit, and Objective-C. I've worked on consumer apps used by millions of users and helped teams improve existing iOS codebases, from isolated bugs to complex legacy projects.


I can help with:


  • Crashes, build errors, and runtime bugs
  • Swift, SwiftUI, and UIKit issues
  • Legacy Objective-C modernization
  • Refactoring and architecture improvements
  • Performance and memory problems
  • API, Firebase, and Supabase integrations
  • App Store and TestFlight release issues
  • iOS compatibility and dependency updates


You'll receive clean, maintainable code and a clear explanation of what was changed.


Please send me the issue, screenshots/logs, and relevant project details before ordering if the scope is unclear. For larger refactoring or modernization work, I can review the codebase first and prepare a custom offer.

  • App type

    • Native

  • Purpose

    • Chat
    • Streaming
    • Music
    • Health & Fitness
    • Maps & navigation
    • Lifestyle
    • Productivity tools
    • Sports

  • Expertise

    • Performance
    • Security
    • Data storage
    • Firebase
    • Release management
    • API integration
    • Compatibility

  • Programming language

    • Objective-C
    • Swift

  • Frameworks

    • SwiftUI
    • Uikit

  • Tools

    • Xcode
    • Firebase
    • Supabase

Get to know Mikhail M

Mikhail M

Senior iOS Engineer

  • FromGeorgia
  • Member sinceAug 2026
  • Avg. response time1 hour

  • Languages

    Russian, English
Senior iOS/macOS engineer with 14 years of experience building and shipping production apps. I help startups and product teams build native iOS apps from MVP to App Store, improve existing codebases, and solve complex Swift/SwiftUI/UIKit issues. My work includes products used by 2.7M+ users and live experiences supporting 30K concurrent viewers. I specialize in AI/LLM features, HealthKit, Core ML, subscriptions, real-time audio/video, architecture, performance, and App Store delivery.

My Portfolio

Related tags