I will develop your ios or android mobile app in swift or kotlin

C
candorlabs
C
candorlabs
William Rangel
develop your ios or android mobile app in swift or kotlin
Full Screen
develop your ios or android mobile app in swift or kotlin

About this gig

I build native iOS and Android apps in Swift and Kotlin. I have 10+ years of development experience and have shipped production mobile apps for marketplaces, field operations teams, and internal business tools.

I handle the full process: we talk through your idea, I design the UX, build the app, integrate your APIs, and get it ready for the App Store or Google Play.

What you get when you work with me:

  • Native iOS (Swift) or Android (Kotlin) development
  • Clean, intuitive UI designed for mobile
  • REST API integration with your existing backend or a new one
  • Data persistence and offline support where needed
  • App Store or Google Play submission
  • Source code you own completely

Good fit for:

  • Startups building an MVP
  • Businesses adding a mobile app to an existing product
  • Teams that need a developer who also understands UX
  • Anyone replacing a web-only experience with a native app

Message me with your idea and I will let you know if I can help and what it would take.

  • App type

    • Native

  • Purpose

    • Music
    • Finance
    • Health & Fitness
    • IoT
    • Lifestyle
    • Travel
    • Crypto
    • Custom
    • Sports

  • Expertise

    • Design

  • Programming language

    • Kotlin
    • Swift

  • Frameworks

    • SwiftUI
    • Jetpack Compose Multiplatform

  • Tools

    • Xcode

Get to know William Rangel

William Rangel

Mobile Developer, Frontend and UX Engineer

  • FromUnited States
  • Member sinceMay 2026

  • Languages

    English, Spanish
I am a software engineer with 10+ years of experience building web and mobile applications. I handle everything from UX design and stakeholder conversations to front-end and backend implementation using, Ruby on Rails, Swift, Kotlin, and Go. I care deeply about how products feel to use, not just whether they work.

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