Andrii Kolisnyk
iOS Engineer
App portfolio
Shipped solo
four apps, live
Hello!

I’m Andrii

I build iOS apps that people
open every single day.
Based in Ukraine
Working worldwide
Andrii Kolisnyk

Swift is my superpower

What
I do

iOS Development

Swift, SwiftUI and Swift Concurrency with strict Swift 6 — MVVM architecture built to feel at home on Apple platforms.

Media & Sync

AVFoundation audio, Readium EPUB, CloudKit cross-device sync, WidgetKit widgets and background playback.

App Store Launch

Zero to global release: RevenueCat and StoreKit subscriptions, ASO and localisation across up to 50 locales.

AI Features

Practical AI inside shipped products — conversational tutoring, curriculum engines and generated audio pipelines.

Selected Work

A few apps
I’m proud of →

About

I am an iOS engineer with around five years of taking apps from an empty Xcode project to a global App Store release. I am the sole iOS engineer on Magibook, a premium subscription reading platform, and the solo founder of four shipped App Store products across up to 50 locales.

Day to day that means owning the whole thing — SwiftUI architecture, audio and EPUB engines, CloudKit sync, subscription monetisation, A/B tests, store metadata and the release itself.

Toolkit

  • Swift
  • SwiftUI
  • Swift Concurrency
  • UIKit
  • MVVM
  • Swift Package Manager
  • CloudKit
  • Firebase
  • RevenueCat
  • StoreKit
  • WidgetKit
  • AVFoundation
  • Readium EPUB
  • PostHog
  • App Store Connect
  • ASO & Localization
  • Python automation
~5yearsshipping production iOS apps end to end
4appsshipped to the App Store as solo founder
~5KMAUon Magibook across 7+ countries
~99%crash-freesessions on the app I own end to end
Lviv Polytechnic National UniversityB.Sc. & M.Sc., Computer Science · 2018 — 2023

Let's build

something great!

Have an app idea in mind? I take it from an empty Xcode project to the App Store.

Contact me
kolisnyk9@gmail.comlinkedin.com/in/andrii-kolisnyk
Ukraine · Remote-friendly
Thank you!