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Achievements

Achievement: Pair Extraordinairex4Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLOAchievement: Public SponsorAchievement: Starstruck

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dadachi/README.md

Hi, I'm Daisuke Adachi 👋

I ship complete products solo — native iOS, native Android, and the Rails backend behind them.
20+ years writing software · AI-driven development with Claude Code & the Claude Agent SDK

Open to full-time & contract roles — get in touch ↓

I'm a full-stack mobile engineer who designs, ships, and operates iOS (Swift / SwiftUI / SwiftData), Android (Kotlin / Jetpack Compose), and Ruby on Rails — all three layers — as a single developer. I've been shipping to the App Store and Google Play for over a decade. Based in Japan 🇯🇵, working in Japanese and English.

Since 2025 my focus has been AI-driven development with Claude Code and the Claude Agent SDK.

🚀 Recent work

Printora — A4 photo printing, powered by automatic person detection. Now on the App Store.

  • Printora — iOS app that auto-detects people in photos and arranges them into A4-optimized print layouts. Swift / SwiftUI / SwiftData / Vision Framework · RevenueCat freemium · 491 unit tests (Swift Testing) · live on the App Store.
  • My Texas Method — Strength-training program generator based on the Texas Method. Swift 6 / Swift Charts / SwiftData + an Apple Watch companion via WatchConnectivity · 973 unit tests · #23 on Product Hunt (74 upvotes).
  • NativeAppTemplate — open-source, production-ready app-template suite plus an AI generator:
    • iOS (SwiftUI, 98★) and Android (Jetpack Compose, 16★) — native templates with user authentication.
    • API — Rails 8.1 backend (Solid Queue / Cable / Cache, no Redis). Listed on Awesome Rails.
    • agent — Claude Agent SDK CLI that turns a natural-language spec into a coherent three-platform SaaS (Rails API + SwiftUI iOS + Jetpack Compose Android) with structural, runtime, and vision-based validation. Built at Cerebral Valley's "Built with Opus" hackathon.

Contract highlight: an XCFramework that reads Japanese Residence Cards (在留カード) over NFC, based on the Ministry of Justice public spec, validated with real test cards at the Immigration Services Agency · 96% unit-test coverage.

🛠️ Tech I work with

Swift SwiftUI Kotlin Jetpack Compose Ruby Rails Hotwire TypeScript Tailwind CSS

📊 GitHub Stats

dadachi's GitHub stats Top languages

📫 Get in touch

I'm actively open to new opportunities — full-time or contract. I prefer environments where I can use Claude Code as my coding assistant.

Thanks for stopping by!

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  1. nativeapptemplate/NativeAppTemplate-Free-iOS nativeapptemplate/NativeAppTemplate-Free-iOS Public

    Modern, full-featured, production-ready native iOS app with user authentication.

    Swift 99 7

  2. nativeapptemplate/NativeAppTemplate-Free-Android nativeapptemplate/NativeAppTemplate-Free-Android Public

    Modern, full-featured, production-ready native Android app with user authentication.

    Kotlin 16 5

  3. nativeapptemplate/nativeapptemplateapi nativeapptemplate/nativeapptemplateapi Public

    Rails 8.1 API backend for NativeAppTemplate iOS/Android mobile applications

    Ruby 14 3

  4. nativeapptemplate/nativeapptemplate-agent nativeapptemplate/nativeapptemplate-agent Public

    Turn a natural-language spec into a coherent three-platform SaaS — Rails 8.1 API + native SwiftUI iOS + native Jetpack Compose Android. A Claude Code agent with structural, runtime, and vision-base…

    TypeScript 7 1