Hire the Best iOS Developers
in Ukraine

𝟮𝟬+ 𝗮𝗽𝗽𝘀 launched, with 𝟭𝟬 𝘆𝗲𝗮𝗿𝘀 of experience building native iOS and macOS apps. 💬 Get 𝗙𝗥𝗘𝗘 20-minute consultation! I’ll review your requirements, discuss the technical approach, and answer any questions. 🤖 Using Codex and Claude Code to 𝗱𝗲𝗹𝗶𝘃𝗲𝗿 𝗳𝗮𝘀𝘁𝗲𝗿 and 𝗿𝗲𝗱𝘂𝗰𝗲 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗰𝗼𝘀𝘁𝘀, with every change reviewed to ensure 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻-𝗾𝘂𝗮𝗹𝗶𝘁𝘆 code. 🚀 iOS Developer | Swift, SwiftUI & Native Mobile App Development As an iOS Developer with 9+ years of experience in Native Mobile App Development, I specialize in building iOS applications with Swift, SwiftUI, UIKit, and Objective-C. I work on production systems with a strong focus on performance, stability, maintainability, and delivering a polished user experience. 💡 Why clients work with me ✅ Native iOS Developer focused exclusively on Apple platforms ✅ 9+ years of hands-on iOS development experience ✅ Strong experience with large and legacy codebases ✅ Production-focused development approach ✅ Clean, scalable, and maintainable architecture ✅ Fast iteration using AI-assisted development workflows ✅ Reliable communication and long-term support I’m comfortable working on both MVPs and long-term products, including apps with complex business logic, real-time features, offline-first architecture, CloudKit synchronization, and App Store releases. My expertise includes: ✔️ Building native iOS apps from scratch ✔️ Improving and maintaining existing apps ✔️ Fixing crashes, bugs, and unstable behavior ✔️ Refactoring legacy UIKit / Objective-C codebases ✔️ Migrating apps to SwiftUI ✔️ Performance optimization & debugging ✔️ API integrations, subscriptions & push notifications My technical expertise includes Swift, SwiftUI, UIKit, Objective-C, CoreData, SwiftData, CloudKit, StoreKit, Firebase, AWS, REST APIs, RevenueCat, AppsFlyer, real-time systems, subscriptions, and push notifications. Have an iOS app to build, improve, or fix? Let’s discuss your goals and how I can help.

👋 My name is Yuri — I'm Upwork's #1 iOS developer in Ukraine. I'm the founder and lead engineer at Helicon, an award-winning mobile development team. Together, we bring decades of experience in building software with a mission of delivering exceptional results at an impressive pace. Are you looking to create an app and need an expert developer who speaks fluent English? I specialize in: — iOS development (UIKit, SwiftUI) — macOS development (Cocoa, SwiftUI) — Vision Pro, Apple Watch, and Apple TV apps — Product management & expert advice for software projects. At Helicon, we are skilled in most of the well-known Swift frameworks as well as third-parties. See the full list below: — UI Frameworks: SwiftUI, UIKit, Combine, RxSwift, The Composable Architecture (TCA) — Backend & Auth SDKs: Firebase, AWS Amplify, Supabase Swift, Auth0, Appwrite — 3D Frameworks: RealityKit, ARKit, SceneKit, Model I/O, Quick Look — Networking Libraries: URLSession, Alamofire, Moya, Apollo iOS, gRPC — Image & Animation Libraries: Kingfisher, SDWebImage, Nuke, Lottie, AVFoundation — Data Persistence Libraries: SwiftData, Core Data, Realm, GRDB, KeychainAccess — Analytics & Monitoring Tools: Firebase Analytics, Mixpanel, Amplitude, Sentry, Branch — Payments & Subscription SDKs: StoreKit, RevenueCat, Adapty, Stripe, Paddle — Developer Tools & Dependency Managers: Swift Package Manager, CocoaPods, Carthage, SwiftLint, SnapKit — Device & Platform Frameworks: CoreLocation, MapKit, HealthKit, CoreBluetooth, WidgetKit I can also assist you with app distribution, marketing, and launch using: — App Store Connect — Apple Developer Platform — Apple Search Ads — Meta Ads Manager (f.k.a. Facebook Ads Manager) My team has first-hand expertise in applying AI models like Claude Opus and GPT-5 to the mobile development workflow, allowing us to offer a great turnaround time for your project without ever sacrificing the human touch. Advanced English proficiency is a requirement for every developer working at Helicon. We also communicate freely, Ukrainian, Polish, and Russian. Don’t hesitate to send me a quick message and we will go over your idea in detail over a video call or through Upwork chat!

I'm Roman, CTO and founder of Define Solutions. Since 2016, we've shipped more than 200 mobile projects generating over 15 million downloads across the App Store. Over the years, we've built products across almost every category: fitness and health tracking, healthcare platforms, GPS and navigation systems, marine navigation applications, mapping and location-based services, entertainment and lifestyle products, news and media platforms, music streaming applications, restaurant and food ordering systems, e-commerce stores, social networks, messaging platforms, e-readers, marketplace applications, iPad products, Apple Watch companions, and CarPlay integrations. Beyond traditional mobile apps, we've delivered AI-powered experiences, recommendation engines, subscription-based products, payment integrations, real-time communication features, complex backend integrations, and highly scalable enterprise systems. We've worked with startups building their first MVPs, established businesses launching new products, and large organizations developing both internal operational tools and customer-facing applications used at scale. Some projects start with a detailed specification. Others arrive halfway through development after a previous team couldn't deliver. We've successfully handled both. One thing you learn after 200+ projects is that writing code is only a small part of building a successful app. The projects that launch smoothly are the ones where requirements are clear, technical risks are identified early, App Store constraints are considered from day one, and everyone agrees on what success looks like before development begins. That's why every engagement starts with understanding the product, validating the scope, and identifying potential challenges before a single line of code is written. Whether you need a new iOS app, help finishing an existing project, or guidance on architecture, scalability, AI integration, App Store launch strategy, or modernizing an existing codebase, I'd be happy to discuss it. Send me a message and I'll tell you honestly whether we're a good fit and what it would likely take to get your project delivered.

𝗡𝗮𝘁𝗶𝘃𝗲 𝗶𝗢𝗦 𝗮𝗽𝗽 𝗲𝘅𝗽𝗲𝗿𝘁 𝗳𝗼𝗿 𝗔𝗽𝗽𝗹𝗲 𝗲𝗰𝗼𝘀𝘆𝘀𝘁𝗲𝗺, focused on turning your iOS App into business value 💎 ⚡ Apple-centric expertise – iOS, iPadOS, watchOS, macOS, Apple TV (tvOS), SwiftUI, UIKit, and iOS SWIFT ⚡ App store success – Apple Xcode, App store guidelines, TestFlight, submission, and release support ⚡ Top Rated Plus – Top 5% of talent on Upwork ⚡ 50+ projects done ⚡ 10 years in iOS Development and Mobile App Development 🎯  Client-oriented, focused on your business results   𝗖𝗟𝗜𝗖𝗞 𝗠𝗘𝗦𝗦𝗔𝗚𝗘 to get a detailed project review As a Mobile App Developer and iOS Developer, I help startups and product teams build a new iOS App, improve an existing iOS Application, or launch a full Mobile App Development project from idea to App Store: architecture, backend integration, authentication, payments, security, performance, TestFlight, and App Store submission. As an iOS Developer I’m focused on Mobile App Development, iOS App Development, and native Apple products for iOS, iPadOS, watchOS, macOS, and Apple TV (tvOS). I build iOS App products for iPhone & iPad Apps, Apple Watch apps, Apple TV Applications, and MacOS App Development using Swift, SwiftUI, UIKit, Objective C, Apple Xcode, iOS SDK, Cocoa Touch, Firebase, StoreKit, Core ML, ARKit, RealityKit, HealthKit, CloudKit, and App Store Deployment. YOU”LL GET WITH ME: ✔️ iOS & macOS – Expertise in Swift, SwiftUI, UIKit, Cocoa Touch, Objective C, and iOS SWIFT for iOS App, iPhone & iPad Apps, Apple Watch apps, Apple TV Applications (tvOS), and MacOS Mobile App Development. ✔️ App Architecture & Database Architecture – Expertise in MVVM, VIPER, Clean Architecture, PostgreSQL, MySQL, Firebase, iOS Developer Swift work, Swift iOS Developer and Senior iOS Developer tasks. ✔️ Networking & API Integrations – RESTful APIs, GraphQL, Alamofire, URLSession, AWS, Firebase, iOS Mobile App Development, and Mobile App Development. ✔️ Authentication & Security – Apple Sign-In, Firebase Authentication, OAuth, JWT, secure logins, iOS App security, and iOS SWIFT authentication flows. ✔️ In-App Purchases & Payments – StoreKit, Apple Pay, Stripe, PayPal, SwiftUI Stripe screens, and payment logic for iOS App and Mobile App Development. ✔️ Apple Health & Fitness Apps – Apple HealthKit, Core Motion, SiriKit Developers, activity tracking, iOS SwiftUI, SwiftUI iOS, and AI Mobile App Development. ✔️ AR & AI App Development – Core ML, ARKit, RealityKit, Apple Motion, AI Mobile App Developer experience, and intelligent iOS App experiences. ✔️ Apple Home & IoT Apps – HomeKit, Bluetooth, SiriKit, smart automation, iOS SWIFT, and native iOS Mobile App Developer delivery. ✔️ App Store Deployment & Optimization – TestFlight, App Store guidelines, Apple Xcode, iOS App Marketing support. DELIVERED HIGH-IMPACT APP s: ✅ Business & Productivity Apps – MacOS and iPad App Development for enterprise workflows, Mobile App Design support, and Mobile UI UX Designer collaboration. ✅ Health & Fitness Apps – Integrated Apple HealthKit & Core Motion for activity tracking, Apple Watch, SwiftUI Developer work, and iOS App Development. ✅ E-Commerce & Marketplace Apps – Secure shopping experiences with Apple Pay, In-App Purchases, StoreKit, Stripe, PayPal, and iOS App Developer ownership. ✅ Streaming & Media Apps – optimized playback, AVKit, AirPlay, Apple TV Applications, tvOS support, and iOS App performance. ✅ Finance & Payment Apps – Secure transactions with Stripe, PayPal, StoreKit, OAuth, JWT, and iOS SWIFT implementation. ✅ IoT & Smart Home Apps – HomeKit & Bluetooth integrations for smart devices, SiriKit, and native iOS App automation. ✅ AR, AI & Motion Apps – Core ML, ARKit, RealityKit, motion analysis, iOS Swift Smartphone flows, and SwiftUI interfaces. APPLE BACKEND & CLOUD SERVICEC: ✔️ CloudKit & iCloud Sync – Seamless Apple cloud storage integration for iOS App, iPadOS, watchOS, macOS, and Mobile App Development. ✔️ Firebase & AWS – Scalable backend architecture, real-time database solutions, Firebase Firestore, REST API, GraphQL, and iOS Developer backend integration. ✔️ macOS Automation & Scripting – AppleScript, Shortcuts, Workflow automation, macOS Swift, ✔️ AI & ML Integration – Core ML, Apple Motion, AI Mobile App Development, ARKit, RealityKit, and intelligent app experiences. My team’s expertise: Mobile App Development, Mobile App Developer, Mobile App Developer, Mobile App Developer Ukraine, iOS Developer, iOS App, iOS App Developer, Full Stack iOS Developer, iOS SWIFT, iOS Swift Developer, iOS App Developer Swift, SwiftUI, SwiftUI Designer, Swift App Developer, Swift Mobile, Swift Designer, Swift Developer, UIKit, Kotlin Swift, React Native Mobile, Node JS React Native Mobile Developer, Full Stack Developer, Web Developer, Flutter Developer, Flutter Mobile App Development, Mobile App Development FlutterFlow, Mobile Game Developer. Sounds like a fit? 𝗠𝗘𝗦𝗦𝗔𝗚𝗘 𝗺𝗲 and get expert consultation 📩 

As a Senior iOS Developer with 15+ years of experience, I will transform the intricate requirements into high-performance, 5-stars Swift and SwiftUI applications that will help you achieve your business goals. I am a specialist in creating long term sustainable, scalable and robust codebase. 🛠️ Skill Set and Frameworks: • Languages: Swift (Expert), Objective-C • UI Frameworks: SwiftUI, UIKit, Combine, CoreAnimation • Architectures: MVVM, VIPER, Clean Architecture, MVC • Data Management: CoreData, SwiftData, SQLite, Realm, JSON/XML • Backend & Cloud: Firebase, AWS, CloudKit, Supabase, REST APIs • Payments & Subscriptions: StoreKit (In-App Purchases), Stripe SDK • Hardware & Location: CoreLocation, MapKit, CoreBluetooth (BLE), HealthKit • Performance: Offline Storage, Multi-Threading, Performance Tuning • Advanced Graphics: Metal, Metal Shading Language • Version Control: Git, SVN 🚀 Let's Build Something Great Together I am a proactive communicator who believes in a transparent cooperation. I don't just write a code, I collaborate with you in solving your problems and ensuring I produce an exceptional product. Ready to get started? Click the "Invite" button to send me a message. I'd be happy to discuss your project goals. 🤝

Senior iOS Developer with 14+ years building apps that ship — from zero-to-App Store MVPs for startups to scaling complex codebases for established products. 🚀 What I can help you with: ✅ New iOS app — Swift, SwiftUI, UIKit from scratch ✅ MVP development — concept to App Store submission ✅ Legacy app rescue — refactor Objective-C to Swift, fix crashes, improve performance ✅ Feature development — in-app purchases, push notifications, location, media, APIs ✅ Code review & architecture — MVVM, MVC, clean architecture ⚙️ Core technologies: 🔹 Swift · SwiftUI · UIKit · Objective-C (legacy support) 🔹 Firebase (Auth, Realtime DB, Push, Dynamic Links, Messaging) 🔹 CoreData · SQLite · RESTful API integration 🔹 AVFoundation · CoreAudio · MapKit · StoreKit 🔹 In-app purchases · Push notifications · GPS · Photo/Video/Audio 🔹 Git · CocoaPods · Swift Package Manager 🔹 App Store submission · TestFlight · deployment I've worked across fintech, social, media, and entertainment apps — including integrations with Facebook, Google, Instagram, Twitter, YouTube, and Vimeo. I also have cross-platform experience in Cocos2d-x (iOS & Android). I use AI-assisted development tools (Claude, Codex) to ship faster without cutting corners on code quality. 14 years means I've seen every edge case, debugged every crash type, and shipped under every kind of deadline. You get a developer who moves fast and doesn't disappear. 📩 Send me your project brief — I'll respond within 4 hours.