Hiroio User

I’m a SwiftUI-first iOS engineer with 3 years of hands-on experience delivering native applications end-to-end—from concept through App Store release—across utility, education, and gamification products. I’m comfortable owning features across the full stack: UI, async data handling, subscriptions/analytics, and release infrastructure.

In recent work, I built scalable SwiftUI-first interfaces (with UIKit where needed) using Combine, Swift Concurrency, SwiftData, and clean architecture patterns to keep the codebase maintainable as features shipped. I integrated StoreKit subscriptions, REST APIs, interactive Charts, AVFoundation media flows, and AI-powered features into production releases, while driving engagement-focused work with SpriteKit/SceneKit, Haptics, and a full notification stack (UserNotifications, Push Notifications, PushKit, CallKit). I also supported release infrastructure with Codemagic CI/CD pipelines plus Firebase analytics instrumentation and AppsFlyer attribution tracking.

Earlier, I built core functionality for a subscription-based tax-service mobile product, including reliable data workflows combining REST/GraphQL API models, offline synchronization, FileManager storage, Core Data, and Swift Concurrency. I implemented WebRTC communication flows and in-app chat support to reduce friction and improve service responsiveness. Outside client work, I maintain independent apps like DeliNote (AI-driven recipe generation with iCloud sync and camera-based ingredient recognition) and Tiny Reads (a Firestore-backed, swipeable mini-reader built around short-form articles).