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iOS / Android / Rails Developer

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👋 Summary Native iOS (SwiftUI) and Android (Jetpack Compose) app development with Ruby on Rails backend integration. 👨‍💻 Open Source Projects iOS: 65 GitHub Stars Android: 11 GitHub Stars Production-ready app templates for iOS and Android, featuring built-in user authentication and advanced NFC capabilities. 📱 Product: NFC-Powered Waitlist App iOS: App Store Android: Google Play Replaces traditional paper number tags with an NFC-based system for managing walk-in waitlists. App writes app-specific data to two NFC tag types: - 🔴 Server Tag - 🔵 Customer Tag ✅ Customer Flow Customers tap a 🔵 Customer Tag to access a 🟢 public Number Tags Webpage displaying completed tags in real time. ✅ Staff Flow Staff tap a 🔴 Server Tag paired with a 🔵 Customer Tag to mark a number as complete. Completed tags instantly appear on the 🟢 Number Tags Webpage for the customer. 🧪 Tech Stack iOS (Swift / SwiftUI) 100% Swift 99% SwiftUI (UIKit only for contact screen) @Observable (iOS 17) SwiftLint MVVM architecture Unit tests with SwiftTesting Android (Kotlin / Jetpack Compose) 100% Kotlin 100% Jetpack Compose Hilt for dependency injection Retrofit2 Proto DataStore Modern Android app architecture Unit tests Backend (Ruby on Rails) Rails 7.1.x devise_token_auth jsonapi-serializer pundit Turbo / Hotwire Backend powers both mobile APIs and dynamic web pages. 🛠️ Skills Programming Languages Ruby Swift Kotlin JavaScript Frameworks & Tools Ruby on Rails iOS Native (SwiftUI) Android Native (Jetpack Compose) Hotwire Tailwind CSS IDEs Xcode Android Studio Visual Studio Code 📚 Recommended Reading Clean Code The Clean Coder Clean Architecture Clean Agile Refactoring Ruby Refactoring UI 📜 Certifications Apple Search Ads Certified 基本情報技術者(Fundamental Information Technology Engineer – Japan) ソフトウェア開発技術者(Software Development Engineer – Japan, formerly Applied Information Engineer)

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Versatile engineer bridging AI and human needs

With 9 years of engineering excellence across diverse domains, I've mastered the art of transforming complex challenges into elegant technological solutions. As the creator and maintainer of the Solid Queue Monitor gem(https://rubygems.org/gems/solidqueuemonitor) —a zero-dependency monitoring solution for Rails background jobs—I've demonstrated my commitment to improving developer tooling in the Ruby ecosystem. In my current role as a Staff Engineer at Torch.io, a coaching platform trusted by industry giants like Stripe, LinkedIn, Airbnb, and TripAdvisor, I've revolutionized support systems by implementing OpenAI's GPT-3.5 for email automation, reducing manual intervention by 48%. I've also leveraged AWS Bedrock with Claude 3.7 to generate organizational insights reports, improving decision-making efficiency by 40%. My technical versatility spans the full spectrum of development—from crafting robust backends with Ruby, Go, and Python to building responsive frontends with React, Angular, and TypeScript. I've engineered large-scale data applications handling 5+ million active users and orchestrated seamless migrations of 4.5 million records while maintaining system integrity. Throughout my career, I've delivered impactful solutions across multiple domains—enhancing FinTech security protocols, optimizing CMS performance, and elevating coaching platforms. This domain versatility, combined with my technical depth and AI integration expertise, allows me to bring a unique perspective to every project and consistently deliver transformative results.