iOS Engineer in Tokyo
I am an iOS engineer focused on Apple-platform applications, offline and local-first workflows, and small tools that solve concrete problems. My recent work spans SwiftUI and UIKit, BLE-based transfer flows, browser extensions, and lightweight developer utilities.
- SwiftUI, UIKit, Swift Concurrency, and maintainable application architecture.
- Offline and device-to-device product flows, including discovery, transport, and recovery.
- Reading, language, and productivity tools across apps, extensions, and scripts.
- Unit testing, UI testing, and pragmatic developer tooling.
| Repository | Summary |
|---|---|
| GhostDrop | BLE-based offline transfer prototype with secure handshake, L2CAP streaming, GATT fallback, and resumable file transfer. |
| AegisTunnel | Swift 6 cross-platform client with a modular core and clean architecture around pluggable transports. |
| listen-to-the-book | Swift-based EPUB and PDF read-aloud project for accessible reading workflows. |
| offline-qr-wallet | QR-based closed-loop wallet system with offline debit, recharge, and settlement flows. |
| yomi-ruby-chrome | Browser reading assistant and one of my most-followed public repositories. |
SwiftUI • UIKit • Swift Concurrency • Combine • BLE • Testing • Extensions • CLI