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Hi! I’m Aditya Jain, a backend engineer with 7+ years of experience in Ruby on Rails. I’ve worked on SaaS platforms, built scalable APIs, and integrated complex systems. I’m joining ruby.social to stay connected with the Ruby community, share knowledge, and learn from others working with Rails and backend technologies. Looking forward to engaging discussions!

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I'm Aditya Jain, a backend engineer with over 7 years of experience, primarily building scalable, secure applications in Ruby on Rails. My journey began in electrical engineering, but I quickly pivoted into software development when I realized how much I enjoyed solving logical problems and bringing ideas to life through code. Rails, with its elegance and convention-over-configuration philosophy, instantly clicked with me—and I never looked back. One of my recent milestones was leading the architecture revamp of a high-traffic Rails-based payments system, optimizing performance under load and ensuring PCI compliance. This not only improved p95 latency by 45% but also reinforced my belief that solid engineering is about thoughtful design, not just writing code that works. What sets me apart is my ability to blend technical depth with business understanding. I don’t just deliver features—I ask why they matter, who they impact, and how we can deliver them better. I’ve led small teams, handled enterprise client integrations, and even driven analytics efforts using tools like ClickHouse. I also enjoy mentoring junior developers and fostering a clean, test-driven development culture. I’m passionate about creating systems that are not only efficient but also maintainable. Whether it's simplifying complex APIs, optimizing background jobs, or managing stakeholder expectations, I thrive in roles where I can be both a builder and a problem-solver.

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iOS / Android / Rails Developer

👋 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)