Chandrakala Ratan

Built and maintained enterprise ERP systems using React with Redux frontend and Node.js for RESTful APIs. Optimized MySQL data models with complex schemas. Created a library of 10+ reusable React components (Table, Dynamic Forms, Dashboards, Charts, Calendars) with Storybook documentation. Optimized MySQL stored procedures, functions, triggers, and views for production modules. Led CI/CD deployments for 5+ client projects using Docker. Mentored peers via pair programming and code reviews, focusing on React performance, clean code, and testing. Collaborated with product owners to draft API contracts with OpenAPI/Swagger, reducing rework by 30%.

Developed a cross-platform mobile application using Ionic and Angular with a single codebase for iOS and Android. Implemented authentication with Firebase and Twilio (SMS OTP). Integrated MTN MoMo payments. Integrated Video.js and Ionic native video player for adaptive streaming. Built an interactive quiz engine with Angular Forms. Implemented internationalization with ngx-translate (English/French). Added analytics with Firebase Analytics and Google Analytics.

Built an Android app with offline support using SQLite and WorkManager. Implemented secure authentication using Firebase Auth with a Twilio-based SMS OTP gateway. Developed an interactive trip-planning app with dynamic maps, cost calculations, real-time fuel pricing, and weather overlays. Created a web app in React to visualize live disaster activity using AI-driven sentiment analysis from social media streams. Built real-time dashboards and D3.js charts; enabled live data via WebSocket; used ESRI ArcGIS for heatmaps, proportional symbol maps, and choropleth maps. Optimized rendering with memoization and efficient state management. Conducted UI automation testing with Appium and backend load testing with JMeter.