I will develop or fix your native ios app in swift and swiftui

J
josefantoni
J
josefantoni
Josef A
develop or fix your native ios app in swift and swiftui
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develop or fix your native ios app in swift and swiftui

About this gig

Hi, I'm Josef, a senior iOS developer with 10+ years of experience building and maintaining production apps for major banks and fintech companies in Europe. My own app Kalorie (native SwiftUI and Jetpack Compose, small shared Kotlin Multiplatform modules, Firebase backend, CI on GitHub Actions; source viewable on my GitHub) shows how I write code.

What I can do for you:

  • Fix bugs and crashes in your existing iOS app
  • Build new screens and features in SwiftUI (or UIKit)
  • Refactor legacy Objective-C / UIKit code
  • Integrate REST APIs and Firebase, add localization
  • Write unit tests and prepare App Store builds and submissions

How I work: clear communication, clean MVVM architecture, tested code and small incremental deliveries. I use AI-assisted development (Claude Code) to move fast without cutting corners.


Please message me before ordering with a short description of your project and I'll confirm scope, price and timeline. Bigger jobs can be handled as a custom offer.

  • App type

    • Native

  • Purpose

    • Chat
    • Finance
    • Health & Fitness
    • Custom

  • Expertise

    • Localization
    • Performance
    • Security
    • Firebase
    • Release management
    • API integration

  • Programming language

    • Objective-C
    • Swift

  • Frameworks

    • SwiftUI
    • Uikit

  • Tools

    • Xcode
    • Firebase

Get to know Josef A

Josef A

Senior iOS Developer

  • FromCzech Republic
  • Member sinceOct 2026

  • Languages

    English, Czech
Senior iOS developer with 10+ years of experience building production mobile apps for major banks and fintech companies, including ČSOB and Raiffeisenbank. Strong in Swift, SwiftUI and the Apple ecosystem, expanding into Kotlin Multiplatform. My app Kalorie runs natively on iOS (SwiftUI) and Android (Jetpack Compose) with shared KMP modules, Firebase and CI; the source is on my GitHub. I use AI-assisted development (Claude Code) and deliver in structured, incremental steps. Open to remote contract or full-time work.

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