🚀 The Top 3% of Talent in iOS & 𝐀𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 Mobile Development ⚡ 𝐀𝐈-𝐀𝐬𝐬𝐢𝐬𝐭𝐞𝐝 Development Workflows Accelerating Delivery by 30–40% ⚡ Experience Building 𝐀𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 Mobile Apps, SaaS Platforms & Enterprise Solutions 🤖 Leveraging Modern 𝐀𝐈 𝐓𝐨𝐨𝐥𝐬 Including Cursor, Claude Code, GitHub Copilot, GPT-4/GPT-4o & Claude Sonnet 👉 WHAT YOU GET ✔️ Senior iOS Developer & AI App Developer - 10+ years experience, intelligent high-performance builds, extreme client impact, end-to-end ownership. ✔️ Swift iOS Developer - native modern interfaces, 18–27% user engagement lift, custom ChatGPT integration, and ultimate trust. ✔️ iOS Mobile App Developer - 30–40% faster release cycles, cleaner AI/UX workflows, stronger user retention across Mobile SaaS platforms. 👉 ACHIEVEMENTS ✔️ 10+ years, 17,000+ hours, dozens of products delivered as a native iOS developer, swift developer, and senior full stack developer ai and mobile application developer workflows. ✔️ Massive client impact and direct revenue generated through full-cycle development as a top-performing iOS developer ai specialist and Apple app developer. ✔️ 100,000+ active users on a popular festival companion app where native iOS mobile app development execution lifted repeat engagement by 27%. ✔️ 10,000+ users in Healthcare App and medical-compliant systems where iOS application development cut data friction by 40% using an intuitive doctor directory website layout. ✔️ High-converting generative AI pipelines, 34% faster action handling in E-commerce Marketplace App, smart assistants, and Fintech App deployments as an experienced iOS developer. ✔️ 90% faster mobile processing and local LLM execution, 80% lower client-side crash workload, 65% fewer server-roundtrips through clean API Integration, push notifications, and iOS developer ai features. ✔️ 5–8 weeks shorter Startup MVP to Pilot Launch, 35% fewer bugs through refactor existing codebase tasks, smart automation, and clean App Store submission pipelines. 👉 WHERE I DELIVER ✔️ As an iOS developer ai specialist - engineering smart features, OpenAI API configurations, Claude API integration, voice AI, and generative AI features into native mobile application development. ✔️ As a SwiftUI developer - dynamic systems with pixel-perfect design, smart assistants, local storage, and complex UI layout across iOS mobile app development and Mobile SaaS infrastructures. ✔️ As an experienced iOS developer - native applications and AI-powered mobile application frameworks built from scratch, delivering 30–40% faster iteration cycles. ✔️ As a native iOS developer - clean MVVM, MVC, and Clean Architecture implementation with secure backend API integrations from Early-Stage Prototype to live product launch. ✔️ As an iPhone app developer - complex core features including OAuth, Apple Sign-In, image & vision processing, audio transcription, in-app purchase setups, and multi-tier subscription systems with RevenueCat. ✔️ As a mobile software engineer - handling advanced audio/video solutions, geolocation services, location tracking, Apple Maps, and real-time chat messaging using WebRTC. ✔️ As a long-term iOS developer - driving ongoing maintenance, smart feature enhancement, bug fixing, and performance tuning as a reliable long-term collaboration partner. 👉 INDUSTRY IMPACT ✔️ AI Mobile App & Smart Assistants - ChatGPT integration, custom AI chatbot agents, voice AI features, generative AI prompts, LLM tools, and automated smart recommendations. ✔️ Fintech App & Wallet Systems - secure mobile banking apps, online payment setups with Stripe and PayPal, and robust local data storage solutions. ✔️ Healthcare App & Telemedicine - secure health tracking platforms, medical records access, and real-time data sync for complex health environments. ✔️ Marketplace App & Booking Systems - scalable service marketplaces, real-time booking, automated push notifications via APNs, and interactive user reviews. ✔️ Fitness App & Workout Platforms - custom sports systems, automated coaching apps, and full-cycle development for high-end Golf Training & Coaching Platforms. 👉 HOW I BUILD ✔️ 10+ years as a mobile app developer: engineering applications with Swift, SwiftUI, UIKit, Xcode, OpenAI API, Claude API, and Objective-C for legacy codebase migration and system scaling. ✔️ Architectural patterns and clean execution: utilizing MVVM, MVC, Clean Architecture, and VIPER alongside Core Data, Realm, and Firebase Cloud Messaging. ✔️ End-to-end product deployment: driving the entire cycle from Proof of Concept, prototype development, QA & DevOps integration, up to a successful publish to App Store workflow. Looking for an elite Senior iOS Developer, Swift Developer, or a trusted ai mobile app developer who can build an iPhone application from scratch, build an AI-powered iOS application, or handle full-cycle end-to-end development? Let's connect! Send an invite and let’s talk about your project goals. ☎️

🚀 Senior iOS & SwiftUI Engineer | Top Rated | 100% JSS | 42+ Apps I’m a Top Rated iOS & Mobile App Developer with 11+ years of experience building scalable, high-performance, and App Store-ready applications. I help startups and businesses turn ideas into reliable, revenue-ready mobile products using Swift, SwiftUI, Objective-C, React Native, and Flutter. Whether you need to build from scratch, fix bugs, improve performance, or scale an existing app, I deliver clean, maintainable code and clear communication from day one. ✅ Core Expertise • Native iOS: Swift, SwiftUI, UIKit, Combine • Cross-platform: React Native, Flutter • Legacy support: Objective-C • REST APIs, Firebase, Backend integrations • App Store & Play Store release support 📡 IoT, BLE & Real-Time Systems • CoreBluetooth, BLE, MQTT, WebSockets • IoT, HealthTech, Automotive, Smart Devices • Real-time data sync & low-latency communication 🧱 Architecture & Quality • MVVM, Clean Architecture, SOLID • Unit/UI tests, CI/CD, Crashlytics • Scalable, secure, production-grade code 💡 Advanced Features • Maps, GPS tracking, Geofencing • In-app purchases, Subscriptions, Push Notifications • watchOS, HealthKit, App Clips, Deep Linking • AI & Image Processing (CoreML, Vision, custom AI APIs) 🌟 Why Clients Hire Me ✔ 10+ years in mobile app development ✔ 42+ successful projects | 100% Job Success Score ✔ Top Rated with repeat & long-term clients ✔ Proven App Store & Play Store launch experience ✔ Strong in BLE/IoT, performance, and scalability ✔ Clear communication & proactive updates ✔ Faster delivery using modern AI-assisted tools 📩 Let’s build your app the right way scalable, stable, and store-ready. Send me a message and let’s discuss your project.

Senior iOS Developer | Swift & SwiftUI Specialist (5 yrs) I design and build fast, reliable iOS apps with SwiftUI, Swift, MVP / MVVM / VIPER architecture, Combine, Firebase, and REST APIs. My code is clean, modular, and covered by XCTest to keep regressions near zero. Strengths 💡 Pixel-perfect UI from Figma, responsive on all devices 🔥 Performance tuning with Instruments & on-device profiling ⚡ Agile, Jira / ClickUp, Git flow & code reviews 📱 Published > 10 apps to the App Store 💬 Excellent Communication, Transparent, friendly, and responsive collaboration 🔖🔖🔖 I'm new on Upwork, and while I don’t have client history here yet, I bring 5+ years of real-world iOS development experience and a proven track record of shipping high-quality apps. I’d love the opportunity to prove myself and build long-term partnerships through great results.

If your iOS app crashes, lags, gets rejected, or just needs to be built right — I'm the developer you call. 10+ years. 90K+ reviews. Zero shortcuts. I've taken apps from a rough idea all the way to millions of real users — and I know exactly what it takes to get there cleanly, fast, and without excuses. 📱 iOS Engineering: Swift 6 / Objective-C SwiftUI / UIKit / AutoLayout / Lottie / Animations Modern Concurrency: async/await, Tasks, Actors, @MainActor, Sendable Combine Framework — reactive programming, publishers, subscribers SwiftData / Core Data / SQLite / Realm Architecture: Clean, MVVM / MVC / VIPER / TCA Networking: URLSession / Alamofire / Kingfisher / WebSocket / REST APIs Payments: StoreKit 2 / RevenueCat / Apple Pay / In-App Subscriptions HealthKit / CoreBluetooth / BLE hardware integrations CoreML / CreateML / OpenAI API — on-device & cloud AI Push Notifications / Deep Links / App Clips / Widgets Liquid Glass UI / iOS 26 APIs CI/CD: Fastlane / GitHub Actions / Xcode Cloud Testing: Swift Testing / XCTest / Unit / UI / Integration CocoaPods / Swift Package Manager / Git 🔍 Code Review & Audit: I can audit your existing iOS codebase for quality, architecture, performance, crash patterns, and App Store readiness — and give you a clear fix plan. 🧠 Consulting: Estimate time and cost for your scope Assess technical feasibility of your idea Recommend the best architecture for your product App Store rejection recovery and resubmission 🏥 Deep Domain Expertise: Health & Fitness apps — HealthKit, calorie tracking, bariatric care IoT / BLE hardware device sync SaaS platforms & CRM systems AI-powered mobile applications Send me your idea — I'll reply within 4 hours.

🚀 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!

I’m a Senior iOS Engineer with 11+ years of professional experience, helping startups and enterprises build stable, scalable, and App Store–ready iOS applications. I’ve delivered 45+ production apps across fintech, healthcare, AI, IoT, and enterprise domains. My focus is not just features, it’s clean architecture, long-term maintainability, and performance-safe code that teams can confidently scale. I specialize in modern iOS development using Swift 6+, Xcode 26, SwiftUI, UIKit, Swift Concurrency (async/await), Combine, and Swift Package Manager. I design modular systems, reusable frameworks, and SDK-level integrations that remain clean and reliable as products grow. What I do best: Build production-grade iOS apps & SDKs Design scalable architectures (MVVM, VIPER, Coordinator) Create reusable frameworks & SPM modules Deliver SwiftUI & UIKit apps with smooth UI and animations Handle complex integrations (AI, AR, IoT, networking, native bridges) Ensure testing, CI/CD, and safe long-term maintenance I take full ownership from architecture and technical decisions to implementation, testing, and final delivery. Clients work with me when they want a senior engineer who gets it right the first time. If you’re looking for a reliable, experienced iOS developer who can build and scale your product with confidence, I’m ready to help.

Senior iOS Developer with 8+ years of experience building, improving, and maintaining production-level iOS applications using Swift, SwiftUI, UIKit, and Objective-C. 🏆 Top Rated Plus (Top 3% on Upwork) ✅ 100% Job Success 💰 $90K+ Earned 📱 40+ Apps Released I help startups and businesses: • fix bugs and crashes • improve app performance • build new SwiftUI features • maintain existing iOS apps • modernize legacy Objective-C code • publish apps to the App Store My expertise includes: • Swift, SwiftUI, UIKit, Objective-C • iPhone & iPad App Development • Bug Fixing & Crash Resolution • App Maintenance & Long-Term Support • Firebase Integration • REST API Integration • Push Notifications • Google Maps & MapKit • Core Data • Authentication & Social Login • Payment Integration • App Store Submission & TestFlight • Performance Optimization • Memory Leak Fixes & Debugging • Objective-C to Swift Migration • Clean Architecture (MVVM, MVC, VIPER) • Responsive & Pixel-Perfect UI • Real-Time Features • HealthKit & ARKit • Unit Testing & Code Refactoring I focus on writing clean, maintainable, and scalable code while ensuring smooth communication and reliable delivery. Whether you need help fixing an existing app, improving UI/UX, adding features, or maintaining a production app, I’m available to help.

I am a high agency developer, and have a CS degree. I'm always hungry to learn and grow. Here’s some of my work: Folderly (Co-Founder): $20K MRR, Took a school project to #1 in Productivity on the App Store. 1M+ downloads, 4.9-star average. Creatorly: Built the backend of an AI influencer management, tracking, and automations, and outreach platform, the system behind Folderly’s marketing success. PushTraining (Mobile Engineer) : $30K MRR, Worked part-time with the founder (former Google, Airbnb) to build the #1 treadmill running app fully dedicated to interval runs. FishVerify (Lead Mobile Developer): $40K MRR. The first fish app in the world before AI. Uses machine learning, tensor flow, AR Kit and now transitioning to the AI world. Winning Record: Won Apple’s Swift Student Challenge (2023) 4× consecutive national hackathon winner I won Apple’s Swift Student Challenge in 2023 without AI tools. Now I’m an AI-native developer, I use Claude Code (MCP, Claude Skills, commands, claude.md) to move faster and build better systems. Best, Lizter Angelo M. Abrau

⭐ Top Rated | 100% Job Success | 10+ Years Experience Build iOS apps from idea to App Store launch Modern iOS, tvOS, watchOS apps with Swift & SwiftUI Integrating APIs, Firebase, and real-time data Implementing in-app purchases and push notifications Optimizing performance and fixing complex bugs I don’t just write code I help turn ideas into reliable, production-ready apps. 🛠 Tech stack: Swift, SwiftUI Firebase (Auth, Firestore, Notifications) REST APIs Core Data, Combine

Market-leading apps in 2026 require more than clean code. They require a strategic technical foundation, scalable architecture, and product decisions aligned with business outcomes. I partner with startups, SaaS companies, healthcare organizations, and enterprise teams to build high-performance native Apple ecosystem applications designed for growth. 𝗶𝗢𝗦, 𝗦𝘄𝗶𝗳𝘁, 𝗮𝗻𝗱 𝗦𝘄𝗶𝗳𝘁𝗨𝗜 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 • iOS Developer specializing in native iPhone App Development • Swift Developer building scalable mobile applications • SwiftUI Developer creating modern Apple experiences • iPad App Development for productivity and business applications • macOS Application Development for desktop software • watchOS Development for wearable solutions • tvOS Development for streaming and media platforms • Native iOS Development focused on performance and maintainability 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁, 𝗠𝗩𝗣 𝗮𝗻𝗱 𝗦𝗮𝗮𝗦 • Mobile App Development for startups and growing businesses • MVP Development for product validation and investor demonstrations • SaaS Development for subscription-based platforms • Enterprise Mobile Applications for internal and customer-facing solutions • Startup Product Development from concept to App Store Launch • Legacy App Modernization and migration to SwiftUI • App Maintenance and Long-Term Product Support 𝗦𝘄𝗶𝗳𝘁𝗨𝗜 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 𝗮𝗻𝗱 𝗦𝗰𝗮𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆 • MVVM Architecture • VIPER Architecture • Clean Architecture • Modular Architecture • Combine Framework • Async/Await Concurrency • Dependency Injection • Scalable Mobile Architecture • Enterprise-grade Code Structure 𝗔𝗜 𝗔𝗽𝗽 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗮𝗻𝗱 𝐀𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬. • AI App Development using modern LLM technologies • ChatGPT Integration for conversational experiences • OpenAI API Integration for intelligent workflows • Apple Intelligence Integration • Generative AI Applications • Computer Vision solutions using Apple's Vision Framework • Image Recognition and Object Detection • AI-powered Productivity Applications 𝗛𝗲𝗮𝗹𝘁𝗵𝗰𝗮𝗿𝗲, 𝗧𝗲𝗹𝗲𝗵𝗲𝗮𝗹𝘁𝗵, 𝗮𝗻𝗱 𝗛𝗜𝗣𝗔𝗔 • Healthcare App Development • HIPAA-Compliant Application Development • Telehealth App Development • Remote Patient Monitoring Solutions • Healthcare SaaS Platforms • Fitness and Wellness Applications • Secure Patient Communication Systems 𝗙𝗶𝗻𝘁𝗲𝗰𝗵, 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻𝘀, 𝗮𝗻𝗱 𝗣𝗮𝘆𝗺𝗲𝗻𝘁𝘀 • Fintech App Development • Stripe Integration • RevenueCat Subscription Integration • Subscription App Development • In-App Purchases • Payment Processing Solutions • Marketplace Platforms • On-Demand Service Applications 𝗙𝗶𝗿𝗲𝗯𝗮𝘀𝗲, 𝗔𝗣𝗜𝘀, 𝗮𝗻𝗱 𝗖𝗹𝗼𝘂𝗱 • Firebase Developer • REST API Integration • GraphQL Integration • AWS Cloud Integration • Supabase Integration • Push Notifications • Twilio Integration • Maps and Geolocation Services • Third-Party SDK Integration 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲, 𝗤𝗔, 𝗮𝗻𝗱 𝗔𝗽𝗽 𝗦𝘁𝗼𝗿𝗲 𝗟𝗮𝘂𝗻𝗰𝗵 • App Performance Optimization • Memory Management • Crash Analysis and Resolution • XCTest • UI Testing • Regression Testing • Application Security • App Store Compliance • App Store Launch and Deployment 𝗖𝗜/𝗖𝗗 𝗮𝗻𝗱 𝗥𝗲𝗹𝗲𝗮𝘀𝗲 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 • Fastlane • Xcode Cloud • GitHub Actions • Automated Build Pipelines • TestFlight Management • Release Automation With 4,000+ hours delivered on Upwork and 8 years of engineering experience, I help companies launch and scale products across healthcare, SaaS, fintech, AI, subscription commerce, and mobile platforms. Whether you need a Swift Developer, SwiftUI Developer, Healthcare App Developer, AI App Development partner, or a team to build and scale your next mobile product, I provide technical leadership from architecture planning through successful App Store Launch. Message me with your product vision. I will provide a high-level technical audit or a roadmap for your next milestone. let’s ensure your app is built to dominate the market. iOS Developer | Swift Developer | SwiftUI Developer | iPhone App Development | Mobile App Development | Native iOS Development | Apple Vision Pro Developer | visionOS Developer | AI App Development | ChatGPT Integration | OpenAI API Integration | Healthcare App Development | HIPAA Compliance | Telehealth App Development | Fintech App Development | SaaS Development | MVP Development | Enterprise Mobile Applications | Firebase Developer | RevenueCat | Stripe Integration | ARKit Developer | Subscription App Development | App Store Launch