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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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Rails Consultant with AI experience

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Seasoned Rails consultant with 8+ years of experience. From MVPs to products with millions of users. Self-driven and easy to manage. I can provide up to 6 hours of overlap with the US timezone and full overlap with EU/UK time zones. Remote: Global, OnSite: India/Middle East/Asia. Some Interesting Complex Problems Solved AI integrations using voice models, openAI, and random forests. Video/audio freeze detection: Used openCV to detect if a video is in a frozen state with more than 99% accuracy CoBrowsing: Created CoBrowsing feature for a customer service app that allows to take control of a customer's browser without using any plugins except this JS CoBrowsing widget code. Server management platform: An internal dashboard for a client that allows users to control thousands of servers and field devices scattered across the globe. It allows the users to execute scripts on those servers, configure, provision, web-based SSH, etc. Common Freelance Gigs Performance optimizations of Rails, PostgreSQL, and Sidekiq: Helped multiple clients to scale Rails Upgrades Legacy modernization: Helping legacy Rails applications to modernize the stack, including the front end. For example, Recently, I helped convert CoffeeScript/AngularJS 1.0 to JS/Vue. Third-party integrations. Skills: Ruby on Rails PostgreSQL React Stimulus TypeScript JavaScript GraphQL Server - Ruby GraphQL Client - Apollo CI/CD (CircleCI, Jenkins) Heroku

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CTO, Senior Full Stack Dev | RoR and Js/Typescript Expert | Remote

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Senior software engineer with over 10 years of experience as a remote freelancer. My educational background includes an MSc 2:1 in computer science and applied mathematics engineering from ENSEEIHT (Toulouse, France) in 2009. I then worked for 2 years as a frontend developer at a startup in London and transitioned to backend work in 2013. Specializing in web application development, I have undertaken projects for companies such as Carrefour, L'Oréal, Cocolis, Epicery, and Alerti. My work has encompassed backend development, data engineering, code and database performance improvement, e-commerce platform customization and logistics, payment system integration, API creation, crawlers, technical documentation, and testing. Passionate about data manipulation and rendering them to users and stakeholders in a more meaningful way, I am currently expanding my skills in AI/ML and neural networks through CNRS fidle formation to explore how I could apply and offer these services to my clients. Recent milestones and accomplishments include: Migrating the payment system from Adyen to Stripe for Epicery Migrating the frontend from Vue to Hotwire for Epicery Developing a geolocalized matching algorithm between carriers and packages for Cocolis Fields of expertise: E-commerce solutions with Solidus/Spree open-source framework Data processing and visualization with Business Intelligence tools for reporting Integration of payment system providers Integration of third-party APIs Database design and performance optimization Frontend performance optimization Crawling and scraping Technical audits Testing, documentation, CI/CD tools Experience with the following tools: Languages: Ruby, Typescript, JavaScript, Node.js, Ruby on Rails Platforms: AWS, Google Cloud Platform, Render, Heroku Frontend: React, Vue.js, Hotwire, Angular, HTML/CSS, Alpine.js, HTMX, Astro Payment providers: Stripe, Mangopay, Adyen, PayPal Data viz: Amazon QuickSight, Superset, Tableau Backend tools: Solidus open-source e-commerce solution, New Relic, Elasticsearch, PostgreSQL, Amazon S3, etc. CI/CD Tools: GitHub CI, CircleCI Fluent in French, English, Spanish.

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Ruby on Rails Expert | Real Time App | NodeJS | ReactJS | NextJS

As a developer with over 7 years of experience, my journey began with a curiosity for how technology can be harnessed to solve real-world problems. Early on, I was drawn to full-stack development because of the opportunity to work across the entire application lifecycle. My expertise lies in Ruby on Rails, ReactJS, and React Native, but my passion for learning has driven me to continually expand my skill set with technologies like GO, NextJS, Node.js, and Python. One of my recent accomplishments was leading the development of a mobile app that streamlined a complex insurance process. By integrating APIs, building a custom voucher system, and enhancing the user interface, I not only improved the user experience but also contributed to a 10% increase in sales. This project reinforced my belief in the power of well-crafted software to drive business success. What sets me apart as a developer is my focus on problem-solving and scalability. I thrive on dissecting complex issues, whether it's improving performance by optimizing code or implementing a solution that scales seamlessly. I’m passionate about helping businesses grow through technology, and I pride myself on my ability to adapt quickly, learn new tools, and apply them to solve unique challenges. Above all, I am committed to building high-quality, impactful software that not only meets the needs of users but also drives meaningful results for the businesses I collaborate with. Whether it’s developing from scratch, maintaining existing projects, or testing new ideas with an MVP, I bring a versatile and solutions-driven mindset to every challenge.

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