Mikhail M.

Senior iOS Developer | Swift, SwiftUI, macOS, AI/LLM | 2.7M+ Users

14 years building Apple apps that carry real load - a fitness app used by 2.7M people, live sports features for broadcasts with 30,000 concurrent viewers, and a macOS AI meeting assistant I built and owned end to end. Native iOS and macOS in Swift, SwiftUI, UIKit and Objective-C. I take ownership of production codebases: at one client my code survived 5 months and 184 commits by other engineers at 91% intact; at another, 43% is still in production 7 months after handover. Recent work: • Built the core health logic for an AI coach using HealthKit, OpenAI function calling, vector search, and custom health scoring. • Implemented 60 FPS pose detection for real-time workout feedback. • Built a macOS meeting assistant with system audio capture, Whisper transcription, AI summaries, and action items. • Built live sports features including predictions, polls, leaderboards, live stats, and video calls for broadcasts with 30,000 concurrent viewers. • Migrated large Objective-C/UIKit codebases to Swift and SwiftUI while keeping regular production releases. I can help with: • macOS applications in SwiftUI and AppKit • AI integration: OpenAI, function calling, streaming, Whisper, vector search, and on-device ML • Modernizing legacy Objective-C applications without pausing releases • Swift 6 migration: strict concurrency, removing data races, async/await • Native iOS development in Swift, SwiftUI, UIKit, and Objective-C • HealthKit, Apple Watch, fitness, and wellness apps • Camera, audio, video, AVFoundation, and real-time processing • StoreKit 2, RevenueCat, subscriptions, and paywalls • Firebase, Supabase, REST APIs, and GraphQL • Performance optimization, crash fixing, and App Store releases Send me a short description of your project, and I'll suggest a practical first milestone.