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
1

Europe · Remote

Now shipping
Fun Calendar app icon

Fun Calendar

Find a holiday. Make a plan. Invite someone.

On the App Store · v1.0.8

  • Free celebration ideas for yourself, for two or with friends
  • Personal invitations in three styles, shared as images or browser links
  • On-device Apple Intelligence plans on compatible devices and supported languages
iPhone + iPad
Devices
16
Languages
3 styles
Invitations
26+
iOS / iPadOS
See the case study
SwiftSwiftUIFoundation ModelsSwiftDataWidgetKitStoreKit 2RevenueCatEventKitUserNotificationsApp GroupsSwiftSwiftUIFoundation ModelsSwiftDataWidgetKitStoreKit 2RevenueCatEventKitUserNotificationsApp Groups
Projects

Apps and games I design, build and ship myself

Every one of these is solo work — architecture, design, localisation, monetisation and release, from SwiftUI apps to an Unreal Engine 5 game.

Fun Calendar app icon

Fun Calendar

Find a holiday. Make a plan. Invite someone.

v1.0.8
On the App Storefuncalendar.app

Turn an ordinary day into a little celebration. Fun Calendar 1.0.8 brings an on-device Apple Intelligence planner to compatible iPhone and iPad models, alongside free celebration ideas and personal invitations you can share as images or browser links. Discover hundreds of holidays, play daily trivia and keep your own dates, reminders and streaks in one place. Available in 16 languages, with 12 illustrated achievements and layouts made for iPad.

  • Swift
  • SwiftUI
  • Foundation Models
  • SwiftData
  • WidgetKit
  • StoreKit 2
  • +4
View in App StoreCase studyWebsite
Cyber Exodus app icon

Cyber Exodus

Sci-fi hover-glider action

In developmentcyberexodusgame.com

Fly low beneath ARCHON's sky shield and reclaim Caelis in a solo-built Unreal Engine 5 hover-glider game. The iPhone and iPad release is in preparation, with a free desert chapter and a one-time purchase planned to unlock the rest of the campaign. The current single-player build has no ads, five customizable hulls, 30 pilot levels and four biomes leading to the Citadel. Mac and Windows versions remain in development.

Ray model: “Neo Shuttle” by pebegou, modified · CC BY 4.0

  • Unreal Engine 5
  • C++
  • Chaos Physics
  • UMG
  • Enhanced Input
  • AI Module
  • +4
Case studyWebsite
Latest updateFun Calendar 1.0.8 — a celebration plan, made for you
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