Юрій

YURII
DERZHYLO
iOS Developer
[відкрити контакти](див. вище в блоці «контактна інформація») [відкрити контакти](див. вище в блоці «контактна інформація») Lviv, Ukraine @yurxezo LinkedIn

PROFILE
iOS Developer with 7+ years of experience designing and delivering scalable mobile
applications across fintech, e-commerce, gaming, education, logistics, travel, fitness,
entertainment, and visionOS. Experienced in application architecture, technical leadership,
performance optimization, App Store release management. Skilled in integrating modern AI
capabilities and leveraging AI-assisted development tools to improve engineering efficiency,
accelerate development, and deliver reliable, scalable, and high-quality products.
EXPERTISE
Apple & Spatial: UIKit • SwiftUI • tvOS • visionOS • RealityKit • ARKit • MapKit • MapLibre • Core
Location • CoreBluetooth • AVFoundation
Architecture: MVVM • VIPER • TCA • ReSwift • Clean Architecture
Concurrency & Reactive: Swift Concurrency • Combine • RxSwift
Networking & Web: GraphQL (Apollo) • Alamofire • Moya • WKWebView • JS Bridge •
WebSockets
Security & Data: CoreData • Realm • Keychain Services • CryptoKit • LocalAuthentication •
Secure Enclave • App Attest • OAuth 2.0 • JWT • TLS/SSL • Certificate Pinning
AI & ML: Core ML • LLM APIs • AI Integration • AI-Assisted Development
Backend & Services: Firebase • AWS • Twilio • Push Notifications • AppsFlyer • OneSignal
Payments & Monetization: StoreKit • In-App Purchases • Stripe • Portmone • PassKit • AdMob •
AdSupport • Facebook SDK
UI & Tools: Charts • Kingfisher • Lottie • Git • Swift Package Manager
Testing: XCTest • Unit Testing • UI Testing • Nimble
EDUCATION
Computer Systems Networking and Telecommunications, Ukrainian National Forestry University
Computer Science, Lviv Polytechnic National University

WORK EXPERIENCE
kombine.tech
Lead iOS Developer Oct 2025 - Jul 2026
Defined architecture and technical solutions across a diverse portfolio of iOS applications, including
gaming, finance, travel, VPN, and utility products, using UIKit, SwiftUI, MVVM, TCA, VIPER, and Clean
Architecture. Designed modular and reusable components shared across multiple projects, improving
scalability, maintainability, and development efficiency. Integrated GraphQL, Firebase, AppsFlyer,
StoreKit, WebSockets, and other third-party services, while implementing secure authentication and
data protection practices. Contributed to product planning, technical documentation, and
development workflows using Jira and Confluence. Led code reviews, mentored developers,
established coding standards, and drove technical improvements across projects. Focused on
application performance, reliability, and production readiness while leveraging AI-assisted
development tools to improve engineering efficiency. Managed App Store release processes by
resolving review rejections, compliance issues, and preparing successful appeals while collaborating
closely with cross-functional Agile teams.

Qualium Systems
iOS Developer Nov 2025 - Apr 2026 (Fixed-term contract)
Developed an immersive aircraft cockpit simulation application for iPad and visionOS using SwiftUI,
UIKit, RealityKit, and ARKit. Designed a scalable architecture for complex spatial interactions, modular
scene management, and interactive 3D cockpit systems with real-time user input and state-driven
behavior. Engineered reusable systems for cockpit controls, interactive components, spatial UI, and
immersive workflows while optimizing rendering performance, memory usage, and responsiveness
across devices. Integrated AI-powered capabilities and backend services using AWS, implementing
API-driven data flows, authentication, data synchronization, and scalable cloud integration. Leveraged
Swift Concurrency and Realm for asynchronous operations and local data management. Contributed
to architecture decisions, technical problem-solving, code reviews, and production readiness across
cross-functional teams.
Forbus Tech
iOS Developer Apr 2023 - Oct 2025
Maintained and evolved consumer-facing, utility, and e-commerce iOS applications, alongside internal
tools for App Store Connect automation. Architected scalable solutions using MVVM+C, MVP, ReSwift,
TCA, Combine, RxSwift, CoreData, Realm, and Alamofire. Integrated Firebase, AppsFlyer, Facebook
SDK, OneSignal, AdSupport, and WebView-based solutions to support analytics, attribution, remote
configuration, monetization, and user engagement. Implemented API-driven features, secure
authentication flows, feature flags, and A/B testing while improving application reliability,
performance, and maintainability. Contributed to App Store Connect automation and managed the
full application lifecycle, including App Store releases, review communication, technical planning,
code reviews, and cross-functional collaboration within Agile Kanban teams.

Codebridge Technology, Inc.
iOS Developer Jun 2023 - May 2024
Contributed to the development of a fitness application and consumer-facing iOS products with
Bluetooth Low Energy (BLE) integrations using CoreBluetooth for device discovery, connection
management, service and characteristic communication, data synchronization, and real-time sensor
data processing. Implemented reliable BLE communication workflows, handling connection states,
data transmission, device interactions, and synchronization between connected peripherals and the
application. Built scalable solutions using MVVM, SwiftUI, RxSwift, and Combine while integrating
Stripe, Portmone, StoreKit, In-App Purchases, Firebase, Affise, AdMob, and OneSignal. Leveraged
GraphQL (Apollo), AWS, CoreData, Twilio, MapLibre, and Charts to deliver data-driven features, real-
time communication, mapping, and data visualization. Contributed to feature planning, architecture
discussions, code reviews, testing, debugging, and performance optimization within Agile
development teams.

IWIS LLC
iOS Developer Oct 2022 - Jun 2023 (Fixed-term contract)
Delivered new features and enhancements for customer-facing iOS applications of leading brands,
including Planeta Kino, Goodwine, and Bad Boy. Developed scalable MVVM+C solutions supporting e-
commerce, ticket booking, loyalty programs, product catalogs, and content delivery. Leveraged
GraphQL, CoreData, Reachability, and WebView to build reliable offline-first experiences with local
data handling, caching, synchronization, and graceful handling of varying network conditions.
Integrated Portmone, PassKit, SwiftyStoreKit, Firebase Cloud Messaging, and MarketingCloudSDK to
support payment flows, in-app purchases, push notifications, and customer engagement. Utilized
Firebase Crashlytics for production monitoring and issue investigation, while leveraging MapKit and
Core Location for location-based functionality and personalized user experiences. Collaborated
closely with product, backend, design, and QA teams on API integration, feature planning, technical
discussions, debugging, testing, code reviews, performance optimization, and production releases
throughout the development lifecycle.

Timelycode
iOS Developer Dec 2021 - Nov 2022
Engineered a branded educational platform for creators and academies featuring video courses,
workshops, mentoring sessions, media galleries, comments, and real-time interactions. Built scalable
solutions using Clean Architecture, ReSwift, UIKit, and SwiftUI while integrating Portmone, Firebase
Realtime Database, Firebase Authentication, Dynamic Links, AVFoundation, Kingfisher, Hero, and
Lightbox. Designed custom authentication and user management flows with secure Keychain storage,
and leveraged MapKit, Mapbox, Realm, URLSession, and Moya to deliver location-aware functionality
and efficient networking. Collaborated on testing, code reviews, debugging, and TestFlight releases to
ensure application quality and reliability.

Kurt Beier GmbH
iOS Developer, Translation Specialist Aug 2019 - Dec 2021
Developed an internal logistics platform for European truck drivers and dispatchers, supporting issue
reporting, client communication, vehicle damage documentation, equipment tracking, and
operational workflows. Designed a modular MVVM architecture using UIKit, CoreData, URLSession,
GCD, and Firebase services, implementing structured workflows for incident reporting, photo-based
documentation, data synchronization, and process automation. Built reliable offline-first functionality
with local persistence, network state handling, background synchronization, and efficient data
processing for business-critical workflows. Integrated Firebase Crashlytics and Firebase Messaging
for production monitoring, crash reporting, diagnostics, and push notifications. Leveraged
AVFoundation and Photos-related APIs for photo-based documentation and media handling, while
using Foundation networking and concurrency mechanisms to support reliable API communication
and background operations. Collaborated directly with English-speaking customers and business
stakeholders, translating operational requirements into technical solutions while contributing to code
reviews, testing, debugging, performance optimization, and workflow validation using Nimble.