Hire the Best Objective-C Developers
in Ukraine

With over ten years of experience, I specialize in iOS and MacOS Software development as a Senior Software Engineer and iOS Team Lead. My main area of expertise lies in the development of mobile (iOS and cross-platform) and desktop (MacOS) applications for communication with and control of external devices, such as different types of speakers, headphones, game controllers, MIDI instruments routers, etc, over various types of connections, including wired connection, BT/BLE, WiFi, and NFC. Throughout my professional journey, I have obtained a solid experience with a full cycle of mobile app development: from requirements analysis, estimation, and architecture solutions proposals up to applications, notarization, validation, and distribution. My technical skills range from legacy pre-ARC Objective-C with xib-based UIKit to modern-day technologies like SwiftUI/Combine/ Concurrency. My skills and experiences include: - Programming languages: Swift, SwiftUI, Objective-C, Flutter - CI/Building: Jenkins pipelines, Fastline, maual application package creation and notarization (macOS) - Applications testing and distribution: AppStoreConnect, Testflight, Firebase Distribution - Monetization: iOS In-App Purchases/Subscriptions - Technologies: reactive programming (RxSwift, Combine), Async-Await Concurrency, Factory DI, SwiftData (storage), iOS Live Activities - Connections/communications: Bluetooth/BLE, WiFi, NFC, wired/USB - UI: from legacy .xib/.storyboard-based UIKit to modern SwiftUI - UI Prototyping: Figma, Addobe After Effects (Lottie animations)

$𝟑𝟎𝐊+ 𝐢𝐧 𝐂𝐥𝐢𝐞𝐧𝐭 𝐑𝐞𝐯𝐞𝐧𝐮𝐞 | 𝟑𝟎+ 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 | 𝟏𝟎𝟎% 𝐂𝐥𝐢𝐞𝐧𝐭 𝐒𝐚𝐭𝐢𝐬𝐟𝐚𝐜𝐭𝐢𝐨𝐧 My goal is simple - your mobile app should be stable, scalable, and valuable for your business. I’m Olha, a Mobile App Developer specializing in native iOS and Android development with Swift, SwiftUI, Kotlin, and Java. I help startups, SaaS companies, healthcare products, fintech platforms, logistics businesses, streaming services, and enterprise teams build mobile applications that are ready for real users. Whether you need an MVP, a new mobile app from scratch, improvements to an existing iOS or Android app, or long-term mobile development support I can help you move from idea to launch with clean native development. ✔️ Mobile App Developer — full-cycle mobile app development from idea, architecture, and development to App Store and Google Play release. ✔️ iOS Developer — native iOS apps built with Swift, SwiftUI, Objective-C, Apple frameworks, and scalable architecture. ✔️ Android Developer — native Android apps built with Kotlin, Java, Android Studio, Google SDKs, and clean maintainable code. ✔️ Native iOS & Android Development — stable, fast, and user-friendly mobile apps without unnecessary cross-platform complexity. ✔️ Long-Term Mobile Development Partner — support, maintenance, new features, performance optimization, and product scaling after launch. 🔥 ACHIEVEMENTS ✔️ 8+ years of experience as a Mobile App Developer building native iOS and Android applications across multiple industries. ✔️ 30+ mobile app development projects delivered for startups, SaaS, healthcare, fintech, logistics, streaming, wellness, and enterprise products. ✔️ $30K+ in client revenue supported through mobile app development, product improvements, and long-term development cooperation. ✔️ Native mobile apps built for products with 2M+ downloads, 500K+ users, and high daily engagement. ✔️ iOS and Android applications delivered for logistics platforms operating across 60+ cities. ✔️ Mobile app development for AI-powered platforms, fintech products, wearable apps, booking systems, delivery apps, and streaming solutions. ✔️ Strong experience improving existing iOS and Android apps through performance optimization, UI/UX improvements, bug fixing, and feature development. 🚚 WHERE I DELIVER ✔️ As a Mobile App Developer — I build mobile applications from MVP to production-ready product, including architecture, development, integrations, testing, deployment, and maintenance. ✔️ As an iOS Developer — I deliver native iOS apps for iPhone, iPad, Apple Watch, and Apple ecosystem products using Swift, SwiftUI, and Objective-C. ✔️ As an Android Developer — I deliver native Android apps for smartphones, tablets, WearOS devices, and Android-based ecosystems using Kotlin and Java. ✔️ As a Native Mobile App Developer — I work with Firebase, AWS, REST APIs, GraphQL, push notifications, subscriptions, analytics, payments, and real-time features. ✔️ As a long-term development partner — I help improve existing mobile apps, reduce technical debt, optimize performance, and add new features without breaking the product. 🏆 INDUSTRY IMPACT ✔️ Healthcare & Wellness Apps — native iOS and Android development for wellness platforms, healthcare tools, wearable integrations, biometric data, and user activity tracking. ✔️ Fintech Mobile Apps — secure payment flows, Stripe and PayPal integrations, Apple Wallet features, subscription systems, and financial dashboards. ✔️ Logistics & GPS Apps — GPS tracking, geofencing, delivery tracking, real-time location updates, driver apps, and logistics management tools. ✔️ Streaming & IPTV Apps — IPTV applications, OTT platforms, FireTV apps, video playback optimization, and low-latency streaming features. ✔️ Wearables & IoT Apps — Apple Watch, WearOS, BLE devices, IoT sensors, smart devices, and biometric integrations. ✔️ AI-Powered Mobile Apps — AI productivity apps, AI wellness platforms, LLM integrations, real-time analytics, and AI-powered user experiences. ✔️ Booking, Delivery & Marketplace Apps — mobile products with user profiles, payments, notifications, dashboards, real-time updates, and scalable app architecture. ⚒️ HOW I BUILD ✔️ iOS Development: Swift, SwiftUI, Objective-C, Xcode, Apple frameworks, Apple Watch, Apple Wallet, App Store deployment. ✔️ Android Development: Kotlin, Java, Android Studio, Google SDKs, WearOS, Google Play deployment, Android architecture. ✔️ Mobile App Development Stack: Firebase, AWS, REST APIs, GraphQL, push notifications, subscriptions, payments, analytics, dashboards, real-time tracking. ✔️ Product Development: MVP development, startup mobile app development, enterprise mobile apps, UI/UX optimization, performance improvements, feature development. ✔️ Architecture & Workflow: clean architecture, scalable codebase, CI/CD, Agile workflow, code review, app maintenance, long-term support.

⚕ 100% Job Success-oriented work. ⚕ Open-minded person, ready to learn anything, easy to work with. ⚕ Self-motivated, strong organized, reliable, dedicated, fast learner and hard working iOS developer. ⚕ Excellent logical, analytical and computational skills. I’m an iOS developer with 3+ years of hands-on experience building apps end-to-end and shipping 30+ releases to the App Store. I mainly work in Swift (and use Objective-C when needed), and I’m comfortable taking a product from “Figma + API docs” all the way to a polished, stable production build. I work across both UIKit and SwiftUI, building clean, responsive interfaces with Auto Layout and modern state-driven UI patterns. I’ve implemented reactive flows with Combine and RxSwift, and I focus on making apps feel fast and reliable through careful performance work and stable architecture. My core interests are products where audio, AI, and real-world context matter. I’ve integrated OpenAI Whisper for transcription, built audio playback features with AVFoundation and AudioKit (including EQ/effects), and shipped location-based functionality using MapKit and Core Location. On the “production” side, I’m comfortable with secure authentication (Face ID / Touch ID, CloudKit), solid data layers (Core Data, Realm, Firebase), and scalable code structure (MVC, MVVM, VIPER where appropriate, SOLID, Clean Architecture). For networking, I’ve built REST API integrations with JSON using URLSession and Alamofire-style stacks, with proper error handling, retries, and clean separation between networking, domain logic, and UI. Design implementation: pixel-perfect UI from Figma, responsive layouts for all screen sizes Quality & performance: optimization, stability, clean code practices I care about shipping apps that don’t just work, but feel polished: clear UI, smooth interactions, maintainable architecture, and performance you don’t have to apologize for later.

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 • AI: Vision, CoreML • 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 🚀 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 Software Engineer | Team Leader | iOS, macOS, visionOS, watchOS | Swift, Objective-C, C++ | AR, AI 🔹 11+ Years of Experience | Master's in AI & Bachelor's in CS | PhD Researcher in Applied Linguistics Passionate software engineer with 11+ years of professional experience in developing high-quality applications for iOS, macOS, visionOS, Windows, and Linux. I specialize in Swift, C, C++, Objective-C, Objective-C++, and Rust programming languages building efficient, scalable, and maintainable solutions. Holding a Master’s degree in Artificial Intelligence and currently pursuing a PhD in Applied Linguistics, where I research OCR for handwritten texts, I bring a unique combination of AI, NLP, and software engineering expertise to projects involving text recognition and automation. 🛠 Tech Stack & Expertise 🔹 Programming Languages 💻 Swift | Objective-C | Objective-C++ | C++ | C | Rust 🔹 Development Tools 🔧 Xcode | Instruments | Terminal | Qt Creator | MS Visual Studio | VS Code 🔹 Architectures & Design Patterns 📐 MVC | MVVM | MVVM+Coordinator | VIPER | TCA | UDF 🔹 iOS/macOS Frameworks & Technologies 📱 UIKit | SwiftUI | Combine | Observation | AVFoundation | CoreFoundation | CoreGraphics | CoreData | CoreBluetooth | CoreLocation | MapKit | PushKit | CallKit | WidgetKit | XCTest | SPM 🔗 Third-party: Realm | RxSwift | SQLite | Alamofire | WebRTC | Twilio | Vonage | Firebase | AWS | Stripe | Google Maps | MapBox | Cocoapods | CarPlay | SiriKit 🔹 Networking & Communication 🌐 TCP/IP | OSI | REST API | GraphQL | WebSockets | VOIP | WebRTC 🔹 Databases & Storage 🗄 MySQL | SQLite | CoreData | SwiftData | Realm 🔹 C++ Libraries ⚙ Qt | Boost | STL 🔹 Scripting & Automation 📜 Bash | Fastlane 🔹 Operating Systems 📂 iOS | macOS | visionOS | watchOS | Android | Windows | Linux (Ubuntu, CentOS) 🔹 CI/CD & Version Control 🔄 Git | GitFlow | SVN | Jenkins | TestFlight | Fastlane | CircleCI | Github actions 🔹 Project Management & Collaboration 📌 JIRA | Trello | Redmine 🔹 UML & Software Design 📊 UML diagrams for system architecture 🔹 Languages 🗣 Ukrainian (Native) | English (Fluent, C1 - CAE Certified) I’m excited to collaborate on challenging projects and build innovative software solutions. Let’s discuss how I can help bring your vision to life! 💬 Let’s Connect!

30+ iOS apps live on the App Store. 10+ years of dedicated Apple development. 100% Job Success Score. I am not a generalist who "also does mobile." This is all I do. Most developers spread themselves thin across React Native, Flutter, Android, and whatever else is trending. I made a different choice: go all-in on Apple and become genuinely world-class at it. Every project I ship runs on pure Swift and SwiftUI — no cross-platform shortcuts, no compromises on performance, and zero sacrifices on native feel. What my Apple-exclusive focus means for your budget & timeline: ⚡ No learning curve: I know Xcode, App Store Connect, and TestFlight cold — you don't pay for my research. ⚡ Scalable architecture: Solid foundations from day one mean no expensive rewrites 6 months down the road. ⚡ Zero surprise rejections: I know the App Store Review Guidelines inside out. ⚡ Advanced Apple features done right: Smooth implementation of WidgetKit, Live Activities, iCloud sync, StoreKit 2, and Sign in with Apple. 🛠 Tech Stack I Use Every Day: Swift • SwiftUI • UIKit • CoreData • CloudKit • WidgetKit • StoreKit 2 • HealthKit • WatchKit • XCTest • Fastlane • TestFlight 📈 My Track Record on Upwork & Beyond: Top Rated badge with a 100% Job Success Score 10+ years of iOS experience (5+ years delivering top-tier projects on Upwork) 30+ shipped apps with 4.5★+ average ratings 10,000+ combined app downloads 🤝 I work best with: Founders and product teams who want a developer who cares about the product's success, not just closing Jira tickets. If native feel, flawless App Store performance, and clean Swift code matter to you — we’ll be a perfect fit. Let’s talk: Drop me a message with a brief overview of what you're building. I respond within a few hours and am happy to jump on a quick discovery call to see how I can help bring your app to life. Updated: 15.07.26