Вадим

Vadym Boiko

iOS Developer

Ternopil, Ukraine

[відкрити контакти](див. вище в блоці «контактна інформація»)

[відкрити контакти](див. вище в блоці «контактна інформація»)
GitHub: https://github.com/vadym-boiko

Summary

Junior iOS developer with a strong focus on SwiftUI and modern iOS architecture. Built and shipped Serenely, a
production‑ready mental well‑being app using SwiftUI, Core Data and OpenAI GPT API, submitted to the App
Store. Experienced with the full development lifecycle – from idea and architecture to App Store submission,
localization and basic analytics. Comfortable working with both SwiftUI and UIKit, REST APIs and persistent
storage on iOS.

Skills

• Languages & Frameworks: Swift, SwiftUI, UIKit, Combine
• Data & Networking: Core Data, AppStorage, URLSession, JSON, Codable
• Architecture & Patterns: MVVM / MVC, View + ViewModel separation
• iOS Platform: SwiftUI navigation, custom gestures & animations, Launch screens, dark mode, in‑app
language switching
• Backend & APIs: OpenAI GPT API (chat, summaries, task generation), OpenWeather One Call API, REST
• Tools: Xcode, Git, GitHub, App Store Connect, Instruments (basic)
Languages:

• Ukrainian – native
• English – B2

Projects

Serenely – AI reflection & tasks (iOS, SwiftUI, Core Data, OpenAI API)

https://apps.apple.com/us/app/serenely/id6756228330

• Developed a mental well‑being app that helps users reflect in an AI chat, receive concise session summaries
and get small, realistic follow‑up tasks.
• Implemented a chat screen with SwiftUI + Combine, auto‑scrolling, typing indicator, keyboard management
and a custom launch experience.
• Integrated OpenAI GPT API for:
• chat replies that adapt to conversation language (Ukrainian/English),
• structured session summaries and up to 7 task suggestions.
• Built a persistent UserPortrait layer with Core Data:
• stores an evolving summary, focus areas, helpful strategies and task statistics;
• uses task usefulness ratings to update preference weights and influence future suggestions.
• Created an advanced TasksView:
• custom swipe actions (Done / Skip / Delete / Restore), history section, strong‑swipe auto‑actions with
circular progress indicators;
• bottom sheet to rate task usefulness; “Back” closes without changes, “Done” moves the task to history and
saves feedback.
• Implemented in‑app localization (EN/UK) with a runtime language switcher.
• Completed the App Store pipeline: app icon, screenshots, age rating, App Privacy, price tier and submission
of version 1.0.0 for review.

MyBlend – Coffee Blend Calculator (UIKit, Core Data) — MyBlend (GitHub)

• Utility app to create and manage custom coffee blends.
• Users can mix up to three coffee types, set percentages and target weight, and see total weight.
• Implemented two main screens with UIKit:
• creation/management of blends;
• overview of total weight of selected coffees.
• Used Core Data for local persistence and swipe gestures to edit/delete blends.
• First iOS project, created to practice UIKit, table views and Core Data.

WeatherApp2 – Weather forecast app (UIKit, MVVM‑style, OpenWeather API) — WeatherApp (GitHub)

• Weather app using UIKit that shows current weather, hourly and daily forecasts via OpenWeather One Call
API 3.0.
• Integrated CoreLocation to automatically determine user city.
• Used URLSession + Codable models for networking.
• MVVM‑inspired structure: WeatherViewModel for data/logic, custom collection view cells for hourly/daily
forecasts, dynamic icons loading.

Minimal To‑Do – Tasks app (SwiftUI, Core Data) — ToDoApp (GitHub)

• Clean, minimal To‑Do list app to practice SwiftUI with persistence.
• Features:
• add tasks, mark as completed, swipe to delete;
• persistent storage via Core Data;
• gradient UI, dark‑mode ready, Xcode Previews for rapid UI iteration.