Oleh

OLEH ZAHORIANSKY
iOS Developer
Kyiv, Ukraine • 32 years old • English (B2), Ukrainian & Russian (Native)

[открыть контакты](см. выше в блоке «контактная информация») • Telegram: quantumScout • [открыть контакты](см. выше в блоке «контактная информация»)

Detail-oriented iOS Developer with 4+ years of hands-on experience building
polished, production-ready applications. Passionate about crafting intuitive user
experiences and writing clean, maintainable code. Experienced in leading development teams,
architecting scalable solutions, and delivering projects from concept to App Store. I take ownership
of my work and thrive in environments where quality matters. Whether working solo or leading a
team, I bring a results-driven mindset, strong problem-solving skills, and genuine enthusiasm for
creating products that users love.

EDUCATION
National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"
Kyiv, Ukraine
•​ Specialist Degree in Information Management Systems and Technologies (2016)
•​ Bachelor's Degree in Computer Science (2014)

TECHNICAL SKILLS
•​ Languages & Frameworks: Swift, SwiftUI, UIKit, SnapKit, Combine, AVFoundation,
CoreData, Compositional Layout
•​ Architecture: MVVM, MVP, Coordinator Pattern, Clean Architecture
•​ Networking: REST API, GraphQL, WebSocket, URLSession, Alamofire
•​ Media: AVFoundation, AVKit, HLS Streaming, Video Recording & Processing
•​ Tools & Other: Xcode, Git, Google Maps SDK, Firebase, SPM, CocoaPods, SwiftLint

PROFESSIONAL EXPERIENCE
Lead iOS Developer — OCTY Apps
May 2022 – April 2025 • Kyiv, Ukraine
•​ Led a team of 3 developers, conducting code reviews and mentoring junior team members
•​ Established architectural standards and development best practices
•​ Fostered a collaborative team environment focused on continuous improvement and code
quality

iOS Developer — OCTY Apps
March 2021 – April 2022 • Kyiv, Ukraine
•​ Joined a growing team and evolved alongside it, tackling diverse challenges and
responsibilities
•​ Built multiple applications from the ground up, often as the sole developer delivering
production-ready results
•​ Took full ownership of projects from initial architecture to App Store release

WordPress Developer — Freelance
2018 – 2021
•​ Developed and maintained custom WordPress websites and plugins for various clients

SMM Specialist — Freelance
2016 – 2018
•​ Managed social media marketing campaigns and content strategy for multiple clients
•​ Developed custom automation software to streamline promotion workflows
KEY PROJECTS
VisitingAid — Social Worker Management App
Role: iOS Developer (2021) • App Store
•​ Performed extensive codebase refactoring and established architectural foundation
•​ Designed and implemented robust network layer and core infrastructure modules
•​ Tech: Swift, UIKit, SnapKit, MVVM+Coordinator, REST API, CoreData, MapKit

RVBooking — RV Rental Marketplace
Role: iOS Developer (2021, Team of 2)
•​ Developed 50% of the application screens and implemented typography system
•​ Established resource management patterns and enforced architectural best practices
•​ Tech: Swift, UIKit, SnapKit, CompositionalLayout, SDWebImage, MVVM+Coordinator,
Google Maps SDK, CoreData, Stripe SDK

Limefox — Restaurant Ordering App
Role: Sole iOS Developer (2022) • App Store
•​ Built complete application independently, from UI implementation to backend integration
•​ Tech: Swift, UIKit, SnapKit, CompositionalLayout, SDWebImage, MVVM+C, REST API,
MapKit, Stripe SDK

Weight Loss Workouts — Fitness App
Role: Sole iOS Developer (2022) • App Store
•​ Built complete application independently
•​ Implemented workout video playback using AVFoundation
•​ Tech: Swift, UIKit, SnapKit, CompositionalLayout, SDWebImage, MVVM+Coordinator,
AVFoundation, In-App Purchases (Adapty), CoreData

KAI Taxi — Ride-Hailing App
Role: iOS Developer (2022, 3 months) • App Store
•​ Performed major refactoring, UI redesign, and WebSocket integration for real-time features
•​ Tech: Swift, UIKit, WebSocket, Google Maps SDK

PickMyBrain — Video Learning Platform
Role: Lead iOS Developer (2022–2025) • App Store
•​ Architected the entire iOS application from ground up, including GraphQL network layer
•​ Built custom video player with HLS streaming and instant video loading optimization
•​ Implemented video recording and processing using AVFoundation and AVKit
•​ Created complex adaptive layouts using UICollectionView with CompositionalLayout and
DiffableDataSource, all UI built programmatically with SnapKit
•​ Implemented Deep Links to seamlessly handle web URLs within the native app
•​ Integrated push notifications via OneSignal with Notification Service Extension support
•​ Automated build and release pipeline using Fastlane for TestFlight and App Store distribution
•​ Tech: Swift, UIKit, SwiftUI, SnapKit, SDWebImage, MVVM+Coordinator, AVFoundation,
AVKit, GraphQL, HLS, CoreData, Universal Links, Push Notifications (OneSignal),
SDWebImage, Adapty, Amplitude, Fastlane, SwiftLint, CocoaPods, SPM

PERSONAL PROJECTS
Mowee — Movie & TV Series Catalog (SwiftUI)
App Store • GitHub Source Code
•​ Complete SwiftUI rewrite of my first iOS project with modern architectural patterns
•​ Tech: SwiftUI, MVVM+C, REST API, Liquid Glass UI

Metrio — Unit Converter Toolkit
App Store
•​ Tech: SwiftUI, MVVM+C
Up25 — Pull-Up Challenge App
App Store
•​ Tech: SwiftUI, MVVM+C, Combine

Mowee — Movie Catalog (UIKit, Original)
•​ My first iOS project, built from scratch as a learning exercise and published to App Store
•​ Tech: UIKit, CoreData, MVVM+Coordinator, REST API