Kirill M.

🚀 iOS Developer | Swift, SwiftUI, UIKit, Obj-C | 30+ Launched Apps | 200+ App Store Rejections Resolved 🌟 Top Rated Plus | 100% Job Success Score Hi! I’m Kyrylo — a results-driven iOS Engineer with over 5 years of experience, 30+ successfully launched apps, and 200+ App Store rejections resolved. I build high-performance, scalable, and future-proof applications for iOS, iPadOS, macOS, watchOS, and tvOS. I take full ownership of your app — from design implementation and architecture setup, to release optimization and long-term support. 🌟 Why Work With Me? ✅ Top Rated Plus – Top 9% of Upwork Talent ✅ 100% Job Success – Clients consistently return ✅ 30+ Published Apps – Real-world App Store expertise ✅ 200+ App Store Rejections Resolved – Compliance expert ✅ Ultra-Fast Response – Clear and proactive communication ✅ Deep Apple Stack Knowledge – True Apple ecosystem dev 🧰 Core Technical Skills 🚀 Languages & Platforms • Swift (5.9), SwiftUI, Objective-C • UIKit, AppKit, Combine, Core Graphics • C, C++, JavaScript (JSBridge), WebRTC, WebKit • tvOS, watchOS, macOS, Catalyst 🧱 Architecture & Design Patterns • MVVM, VIPER, MVC, Clean Architecture • SOLID, TCA (The Composable Architecture), RIBs • Coordinator Pattern, Dependency Injection (Swinject, Resolver) • Combine + Redux-like state management • Modular architecture and feature-based code splitting 📡 Networking & API • URLSession, Alamofire, Moya • REST, GraphQL, gRPC • WebSockets, MQTT, Socket.IO • Background Tasks, Push Notifications, Remote Config 🧮 Databases & Persistence • CoreData, Realm, SQLite, GRDB • Firebase Realtime Database, Firestore • iCloud / CloudKit, Keychain, Secure Enclave • UserDefaults, App Group Shared Storage 🔐 Authentication & Security • Apple Sign-In, Firebase Auth, OAuth 2.0 • JWT, SSO, 2FA, biometric auth (Face ID, Touch ID) • DeviceCheck, AppAttest, Keychain Access 💰 Payments & Monetization • StoreKit 1 & 2, RevenueCat, Subscriptions • Apple Pay, Stripe, PayPal • In-App Purchases (consumable/non-consumable), sandbox testing • Promo codes, offer codes, trial setup 📊 Analytics & Crash Reporting • Firebase Analytics, Crashlytics • Mixpanel, Amplitude, Sentry • Custom logging frameworks, DebugTools, MetricKit ⚙️ DevOps, Testing & CI/CD • Xcode Cloud, Bitrise, GitHub Actions, Fastlane • XCTest, Quick/Nimble, Snapshot Testing • TestFlight, Beta testing, A/B Testing • Code coverage, static analysis (SwiftLint, SonarCloud) 📱 Types of Apps I Build ✅ Enterprise Tools & B2B Solutions – Mac & iPad apps for internal systems ✅ Health & Wellness – HealthKit, CareKit, Mindfulness APIs ✅ FinTech & Crypto – KYC/AML flows, realtime charts, biometrics ✅ E-Commerce & Marketplaces – Complex cart flows, product filters, custom UI ✅ Social & Messaging – WebSockets, group chats, mentions, push notifications ✅ Streaming & Media – AVFoundation, AirPlay, DRM, Apple TV support ✅ Smart Home / IoT – HomeKit, CoreBluetooth, Zigbee/MQTT integration 🔧 Apple Cloud & Backend Experience • CloudKit, Key-Value Store, App Groups • Firebase – Auth, Hosting, Functions, Messaging • AWS – S3, Cognito, Lambda, EC2, DynamoDB • Backend-as-a-Service: Supabase, Hasura, Parse • App Automation – Shortcuts, SiriKit, AppleScript, Background Sync • Push Services – APNs, Firebase Messaging, VoIP pushes 💬 Why Clients Keep Coming Back ⭐️ End-to-end ownership – From idea to App Store ⭐️ Clean, scalable code – Written for performance & growth ⭐️ Deep Apple ecosystem understanding – Not just iOS ⭐️ Rejection-proof development – I’ve fixed 200+ App Store issues ⭐️ Crystal-clear communication – No micro-managing needed ⭐️ Figma-to-Code fluency – Pixel-perfect UI implementation ⭐️ Fully async-ready – Combine, async/await, concurrency best practices 📬 If you’re looking for a trusted iOS/macOS expert to build, launch, or rescue your app — let’s talk!