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Senior iOS developer with 15+ years building native apps - from small MVPs to products used by tens of millions. I work solo as the sole developer on every project, combining deep engineering depth with senior business leadership experience (VP roles at companies like Activision Blizzard). $1M+ earned on Upwork as a non-agency developer, 100% job success score for over a decade, Top Rated Plus, and Expert Vetted. Whether you're launching something new, rescuing a stalled project, or evaluating AI-built code before shipping, I bring both the technical judgment and the business context to help you make decisions that hold up. The "No-Agency" Guarantee: No handoffs. No junior developers. No communication gaps. When you hire me, you get 15+ years of senior judgment applied to every line of code. ◆ Why Work With Me • 15+ years building iOS apps with millions of users. • Expert in Swift, SwiftUI, Objective‑C, and services like Firebase, AWS, RevCat, AdMob, and APIs. • AI-assisted development used deliberately, with senior judgment on quality and architecture. • Business fluency in budgeting, product strategy, and communication. • PMP certified; led 7‑figure projects at companies like Activision Blizzard. • Honest recommendations, even when that means pushing back or suggesting a different path. ◆ Services • End-to-End iOS Development: From concept to App Store launch. • AI Code Cleanup: Stabilizing and refining apps built by AI into production-ready products. • Project Rescue: Fix bugs, refactor code, modernize UI/UX, and get stalled apps back on track. • AI-Powered Features: Intelligent text, image, and voice capabilities to give your app a competitive edge. • App Store Strategy: Compliance, monetization, and feature planning to maximize success. ◆ What Clients Say (150+ Five-Star Reviews) "Scott is truly outstanding. Extremely skilled, great communicator, professional, ethical, resourceful, dependable, responsive. A huge asset and leader for any project." - Native iOS App (1,035 hrs, 5.0⭐) "Scott is a rockstar. Scott is strategic and extremely capable and always delivers. I will definitely work with him again." - Native iOS App (592 hrs, 5.0⭐) "Scott is the 'total package' - responsive, skilled, fair, detail-oriented and many more positive attributes. I would highly recommend him for any project." - Apple TV App (403 hrs, 5.0⭐) ◆ Let’s Build Something Great Every project I take on gets my full attention - I work solo, limit the number of simultaneous clients, and stay engaged from the first call through delivery. If you want to talk through your project, I'm happy to start with a short call or my 1-hour consultation. Either way, no pitch and no obligation.

I focus on building reliable software and solving difficult technical problems efficiently. I specialize in building and stabilizing VPN applications for iOS and macOS using Swift — and in hybrid stacks where a Go networking core powers the packet tunnel (gomobile, DNS interception, UDP/TCP relay) alongside Network Extension on the Apple side. My work focuses on the parts that are hardest to get right: NetworkExtension integration, tunnel lifecycle, lock/sleep recovery, kill switch and on-demand behavior, reconnect flows, and platform-specific networking edge cases under iOS memory and background limits. I also work with Xray and Libbox integrations and have hands-on experience with VPN technologies including OpenVPN, IKEv2, IPSec, WireGuard, VLESS, VMess, and Shadowsocks. Recent delivery: stabilized a production parental-control VPN app — domain and image filtering, MITM inspection, DNS hardening (including DoH fallback), and fixed intermittent "no internet while VPN is on" after extended device lock. Shipped stable TestFlight builds with production-ready, root-cause fixes. I help teams resolve difficult issues around race conditions, state management, reconnect behavior, and long-running reliability across Apple platforms (iOS, macOS, tvOS). I'm a strong fit for projects that need more than basic mobile development — especially apps where connection stability, traffic filtering, native platform behavior, and deep debugging are critical. What I can help with: • iOS and macOS VPN development (NetworkExtension, Packet Tunnel) • Swift + Go hybrid VPN cores (tunnel, DNS, stability) • Kill switch, on-demand, reconnect, and tunnel management • Parental control / content filtering (domains, HTTPS image inspection) • Debugging lifecycle, networking, and memory-pressure issues • Stability, performance, and production hardening I focus on production-grade reliability — stable tunnels, correct filtering under edge cases, and fixes that hold up in real-world use (lock/sleep, reconnects, memory limits), not temporary workarounds.

$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.

Hi, I am a professional iOS, watchOS, tvOS and macOS Developer. I have 7 years of experience in complete iOS, tvOS, watchOS, and macOS developing apps, communicating with customers, and publishing. I’ve also developed a personal app for learning based on Ebbinghaus’s curve and an enhanced music app 
So far, I’ve: ⭐️ worked on a project with >1M users (3 developers). ⭐️ worked on a project with 150k users (99.96% crash-free, 2 developers). ⭐️ leading app development from the idea stage through design, refinement, and implementation
. ⭐️ worked on 15+ projects Experience: 🟢 Language: Swift, Objective-C, Python(beginner) 🟢 Architectures: MVC, MVVM+C, VIPER, TCA 🟢 Patterns: Facade, Adapter, Decorator, Factory Method, Singleton, Builder, Observer, Command, SOLID 🟢 Database framework: CoreData, Realm 🟢 Networking: REST API(URLSession, Alamofire, Moya), GraphQL(Apollo) 🟢 Multi-threading: GCD, OperationQueue, Async/Await 🟢 Reactive programming: ReactiveSwift, ReactiveCocoa, Combine 🟢 VCS: Git 🟢 CI: Fastlane 🟢 Tools: Xcode, Figma, Sourcetree, Sketch, Zeplin, Postman, Proxyman, Xcode instruments 🟢 Apple’s Framework: UIKit, SwiftUI, Combine, Foundation, Core Data, Core Location, AV Foundation, MapKit, Core Animation, Contacts, CoreMotion, CarPlay 🟢 Other frameworks: Keychain, R.swift, Firebase, FBSDK, Google SDK, Stripe, Google Places, SnapKit, Google AdMob 🟢 Project management tools: JIRA, Trello, Clickup. 🟢 Other: In-App Purchases, Push Notifications 🟢 Operation system: iOS, tvOS, watchOS Highlights: ⭐️ App Features: In-App Advertising, Payment Functionality, Map Integration, Bluetooth, Location-Based Service, Camera, Social Media Account Integration, QR & Barcode Scanner, Advanced Analytics, Offline Functionality, Review or Feedback Collection, User Profile Creation, Push Notifications, In-App Purchases, User Authentication, In-App Search, Chat & Messaging Software, API Integration, Application Security, AI Text-to-Speech, Face Detection, Microphone, Motion Sensor, In-App Support ⭐️Mobile App Dev Tools: Firebase, Google Analytics, iOS Development, Apple Xcode, Alamofire, Twilio API, Mobile App Development, GraphQL, OpenAI API, RESTful Architecture, iOS SDK, AFNetworking, RxSwift, GitHub ⭐️ Devices: Tablet, Smartphone, TV Set ⭐️ Mobile App Dev Deliverables: Native App Development, Mobile App Development, Mobile App Localization, Mobile App Redesign, Mobile App Testing, Payment Gateway Integration, Mobile App Improvement, Mobile App Bug Fix, iOS Development, Mobile App Development Consultation ⭐️ Mobile App Dev Databases: SQLite, Realm Database, Firebase Cloud Firestore, Firebase Realtime Database ⭐️ Mobile Platforms: tvOS, iOS, iPadOS, macOS, watchOS ⭐️ Apple Development Tools: HealthKit, SpriteKit, UIKit, Core Bluetooth, CloudKit, StoreKit, AVKit, PassKit, EventKit, HomeKit, SiriKit, MapKit, Core Data, PushKit, TVMLKit, WebKit, WatchKit ⭐️ Mobile Programming Languages: Objective-C, Swift ⭐️ Other keywords: Apple TV Application, Apple HealthKit, Apple Watch Application, Apple Watch, Apple Motion, SwiftUI, iPhone, iPhone & iPad Apps, Mobile App Thanks for reading that far🙂. 
Let’s help to grow your business together - feel free to contact me. Best regards,
 Taras

I have 14 years of experience in Java, Android, iPhone, and Web Development. I have developed over 150 Android and iPhone apps, many of which are available on various app stores, along with their corresponding backends and web applications. I am capable of delivering any type of high-quality application on time. ✅ Top Rated ✅ More than 10600 hours of work ✅ SwiftUI, React Native, Flutter, MAUI ✅ Back-end API development (Node.JS / Flask / Django) ✅ Machine Learning

Senior OTT & Smart TV Platform Architect | Roku | Tizen | LG webOS | Apple TV | Android TV | OTT Monetization, Website Ads & AI Solutions 🚀 I Build Scalable OTT & Smart TV Streaming Platforms I help media companies, startups, and enterprises design, develop, and launch high-performance OTT applications across Roku, Samsung Tizen, LG webOS, Vizio, Apple TV, Android TV, and mobile platforms. From architecture planning to store deployment, I deliver production-ready streaming solutions optimized for performance, monetization, and long-term scalability. If you're building a serious OTT product — you're in the right place. 📺 Platform Expertise • Roku Channel Development (BrightScript & SceneGraph) • Samsung Tizen TV Apps • LG webOS TV Apps • Vizio Smart TV Apps • Apple TV (tvOS) • Android TV • iOS & Android Mobile Apps • Web Streaming Platforms & Admin Panels I deeply understand TV remote navigation, focus management, 10-foot UI design, and hardware limitations — which most developers struggle with. 🎬 OTT & Streaming Architecture I specialize in complete OTT workflows: • Live TV & VOD Platforms • HLS & MPEG-DASH Integration • DRM (Widevine) • EPG (Electronic Program Guide) • Multi-profile & Authentication Systems • Dynamic QR Login for TV Apps • Video Player Customization • Performance Optimization for TV Hardware 💰 Monetization & Revenue Systems I implement revenue-focused OTT platforms: Monetization Models • SVOD • TVOD • PVOD • AVOD • In-App Purchases Payment Integration • Roku Pay • Fire TV IAP • Stripe • PayPal • PayU 📢 Advanced Ads Integration • Google PAL SDK, Sabio Ad In roku • DAI (Dynamic Ad Insertion) • VAST Tag Integration • AWS MediaTailor • Pre-roll / Mid-roll / Post-roll Ads • Custom Video Ad Workflows ☁ Backend, Cloud & Infrastructure • Node.js, PHP, Laravel • REST API Integration • MySQL, PostgreSQL • AWS (EC2, S3, Media Services, SNS, Lightsail) • Firebase • Vimeo (VHX) Integration • CDN Integrations (Bunny, Gumlet, Limelight, Field59) 📊 Analytics & Tracking • GA4 • MUX • Segment I build data-driven streaming platforms with proper event tracking and performance monitoring.