Portrait of Yevhen Kharytonenko

Hey, I'm Yevhen

iOS App Developerbuilding for the Apple ecosystem

Twelve years of native Apple development — telemedicine, diabetes care, automotive services, e-commerce — for teams in five countries. I've taken apps from an empty Xcode project to the App Store as the only iOS engineer on the team. Now I build my own the same way.

View my appsWork with me
Years in iOS
12
Client products
8
Countries
5
Own apps
2

Europe · Remote

Now shipping
Fun Calendar app icon

Fun Calendar

A new holiday every single day

On the App Store · v1.0.1

  • Tinder-style swipeable card deck for the day's holidays
  • Personal events, notes and anniversaries alongside 365+ holidays
  • Streaks, achievements and a “My Year in Fun” stats screen
365+
Holidays
16
Languages
App + Widget
Targets
26.0
Min. iOS
See the case study
SwiftSwiftUISwiftDataWidgetKitStoreKit 2RevenueCatEventKitUserNotificationsApp GroupsSwiftSwiftUISwiftDataWidgetKitStoreKit 2RevenueCatEventKitUserNotificationsApp Groups
iOS Projects

Apps I designed, built and shipped myself

Every one of these is solo work — SwiftUI architecture, design, localisation, monetisation and App Store Connect.

Fun Calendar app icon

Fun Calendar

A new holiday every single day

v1.0.1
On the App Storefuncalendar.app

Every day is a holiday — you just didn't know it yet. Fun Calendar turns 365 days of quirky, heartfelt and downright strange holidays into a swipeable daily ritual: a card deck for today, a full month calendar, instant search, personal events and notes, streaks, achievements and a year-in-review. Localized into 16 languages, with home-screen widgets and alternate app icons behind a RevenueCat-powered Pro tier.

  • Swift
  • SwiftUI
  • SwiftData
  • WidgetKit
  • StoreKit 2
  • RevenueCat
  • +3
View in App StoreCase studyWebsite
Enigma: AI Oracle & Tarot app icon

Enigma: AI Oracle & Tarot

A quiet place to think, entirely on-device

Coming soonenigmacards.app

Type a question in your own words and the Oracle answers in a line or two of its own — composed by Apple's on-device Foundation Models, so the question never leaves the phone. No server, no account, no analytics: it still answers in airplane mode. Around that sits a private journal that keeps every reading and your notes on it, three decks (metaphorical association cards, the 22 Major Arcana, classic 52-card cartomancy), past–present–future spreads, a numerology chart, a daily forecast built from the real moon phase, and a SceneKit Book of Wisdom. Sixteen languages, right-to-left included.

  • Swift
  • SwiftUI
  • SwiftData
  • FoundationModels
  • SceneKit
  • SpriteKit
  • +2
Case studyWebsite
Latest updateEnigma is in review — with an oracle that runs on the phone
Client work

Eight products, five countries

Healthcare and connected medical devices, automotive services, e-commerce and wellness — as a contractor and as the sole iOS engineer.

  • Diabetes care & health devices

    • Objective-C
    • Swift
    • HealthKit
    • Device SDKs
    • HIPAA

  • E-commerce

    • Objective-C
    • Swift
    • UIKit

  • Enterprise macOS

    • Objective-C
    • AppleScript
    • PostgreSQL
    • macOS
Toolkit

Native by default, Apple-first by choice

On my own apps I build the whole thing — architecture, UI, animation, persistence, paywalls, localisation and submission. No handoffs, no drift between design and code.

Language

  • Swift
  • Objective-C
  • SwiftUI
  • UIKit
  • Swift Concurrency

Architecture

  • MVVM
  • Clean
  • Combine
  • SwiftData
  • Core Data
  • Realm

Apple frameworks

  • WidgetKit
  • HealthKit
  • MapKit
  • CallKit
  • SceneKit
  • StoreKit 2

Delivery

  • Fastlane
  • CI/CD
  • App Store Connect
  • Localization
  • Scrum
Contact

Got an iOS idea? Let's build it properly.

Freelance work, a full app from scratch, or a SwiftUI codebase that needs rescuing.

Emailhello@yevhentech.com
  • Usually replies in < 24h
  • Europe · Remote