avatar

Justyn Adusei_

iOS Engineer

GitHub:
Clyrko
LinkedIn:
Justyn Adusei
Email:
justynadusei@gmail.com

AboutMe_

I’m a passionate iOS developer with over five years of experience building intuitive, high-performance mobile applications. I specialize in Swift and SwiftUI, with a strong foundation in UIKit, Combine, and Core Data. I care deeply about creating clean, maintainable code and crafting user experiences that feel fast, polished, and meaningful. I’ve shipped apps independently and as part of collaborative teams, and I’m always exploring new technologies—recently working with Core ML, Flutter, and server-driven UI architectures. Whether I’m debugging a tricky UI issue or optimizing for performance, I bring curiosity, attention to detail, and a love for thoughtful product design to everything I build.

Download CV

Personal Projects_

Ayewam - Ghanaian Recipe App

Ayewam preserves Ghanaian culinary heritage through an intelligent recipe app that combines traditional cooking with modern technology. The app features a sophisticated recommendation engine that learns user cooking patterns, suggesting personalized recipes based on time of day and preferences. Built with advanced cooking assistance including multi-timer support with Live Activities, background notifications, and step-by-step guided cooking mode with haptic feedback. The app demonstrates complex iOS architecture with behavioral tracking, cultural preservation focus, and seamless user experience that makes traditional Ghanaian cooking accessible to modern kitchens.

Used stack:

  • SwiftUI
  • Core Data
  • CloudKit
  • Live Activities
  • Combine
  • MVVM
  • StoreKit
  • UserNotifications
  • WidgetKit
  • Haptic Feedback
Download on the App Store
Ayewam app screenshot
Adinkra app screenshot

Adinkra

Adinkra is a cultural education app designed to help users learn about Akan Adinkra symbols, their meanings, and pronunciation. Originally built with UIKit, I rebuilt the app using SwiftUI to modernize its architecture and improve performance. The app includes audio playback with AVFoundation, offline storage via Core Data, and uses async/await with Combine to ensure smooth and responsive interactions. I also integrated Core ML to allow users to scan and identify symbols using their device’s camera, adding an AI-powered interactive layer to the experience. It was a rewarding project that let me combine clean design, performance tuning, and cultural storytelling in a production iOS app.

Used stack:

  • Swift
  • SwiftUI
  • Combine
  • Core Data
  • AVFoundation
  • Async/Await
  • Core ML
  • Vision
Download on the App Store

Annivent

Annivent streamlines event planning by merging elegant design with powerful functionality. Born out of the challenge of organizing complex social gatherings, this full-stack application simplifies every aspect of event management. It handles invitations with unique codes, tracks RSVPs in real-time, manages guest lists, and provides interactive timelines with Gantt charts for task visualization. With offline capabilities, social authentication, and robust synchronization, Annivent ensures a seamless experience whether planning a wedding, corporate event, or birthday party. The app demonstrates my ability to architect complex systems that solve real-world problems while maintaining a focus on user experience and technical excellence.

Used stack:

  • Swift
  • SwiftUI
  • MVVM
  • Combine
  • ASP.NET Core
  • Entity Framework
  • JWT Auth
  • Keychain
  • Calendar Integration
  • Offline Sync
iOS Source Code Backend Source |
Annivent app screenshot
-->

Resume_

My journey has included roles beyond engineering—from building iOS apps to leading teams, mentoring peers, and driving product performance. This section outlines my career and education, reflecting both technical depth and real-world impact.

employment

Hubtel

Sep 2022 – Present

Mobile App Developer

Led migration from native iOS to Flutter, improved iOS checkout UX (conversion +16%, AOV +22%), and refactored architecture to MVVM with protocol-oriented programming.

Effect Studios

May 2020 – Present

iOS Engineer - Team Lead

Delivered native iOS apps using Swift & Core Data; optimized UI from Figma to App Store; led performance tuning & updates across 5+ live apps.

Ghana Tech Labs

Jun 2019 – Sep 2019

Software Engineer Intern

Built cross-platform QR code scanner for attendance system; participated in iOS training focused on Swift and architecture fundamentals.

education

Central University

Sep 2018 – Jul 2022

Bachelor of Science in Computer Science

Relevant Courses: Mobile Dev, Algorithms, AI, Security | Activities: Mobile App Team Lead (CU Developers), AI Society, Programming Club


Skills & Tools_

My technical toolkit has been refined over years of building iOS applications and exploring related technologies. Here's an overview of my skills and the tools I'm proficient with.

Swift

SwiftUI

UIKit

Core Data

Combine

XCTest

Flutter

Firebase

MapKit

Core ML

RESTful APIs

JavaScript

HTML/CSS

Git

GitHub

Command Line


Contact_

Have a project in mind or want to discuss a potential collaboration? Feel free to get in touch using the form below.