Mobile & web front-end engineer with a passion for Flutter.
- 📦 pub.dev publisher — koji-1009.com (20+ packages)
- 🛠️ Contributing to flutter/flutter — Framework / Engine / Web / iOS
- 🎤 FlutterKaigi speaker — slides & past talks
- 🐦 @D_R_1009
UI & Widgets
- paging_view — paged lists, inspired by Android Jetpack Paging
- carousel_slider_x — carousel with infinite scroll & auto-play
- viewfinder — photo gallery with zoom & drag-to-dismiss
- password_text_field — TextField with obscurity toggle
Data & Platform
- flutter_secure_storage_x — secure storage via Keychain / KeyStore (all platforms)
- taro — network image loading with storage cache
- http_hive_cache — HTTP GET caching with Hive
- platform_image_converter — cross-platform image format conversion
- qr_scanner_view — live QR/barcode scanner (AVFoundation / CameraX + ML Kit)
- share_binary — share binary files via the OS
- static_map_service — type-safe static map URLs (Google / Apple / Mapbox)
- iso8601_offset — ISO 8601 offset handling for DateTime
- dapper — Markdown & YAML formatter, inspired by Prettier
- setup-flutter — GitHub Action to set up the Flutter SDK in CI
- Code-quality metrics & unused public-API detection, built for the AI-agent loop — dartrics (Dart) / ktrics (Kotlin & Java) / cargo-rustics (Rust)
- astronoha (live) — search Diet & Imperial Diet speeches from Meiji to Reiwa, across multiple National Diet Library APIs
- crumple-zone-architecture — an MPA + Islands architecture for building healthy web apps by trusting the browser
- crz-patterns (live) — demo catalog proving common "SPA-only" UI patterns work on the web platform alone
- blog.dr1009.com — Japanese; Flutter, OSS activity logs, work notes, and the occasional hobby post
- koji-1009.medium.com — English; Flutter, tooling, and architecture