I'm a passionate software developer from Kolkata, India, who loves building real-world solutions using Java, Spring Boot, MongoDB, and modern JavaScript frameworks. I specialize in backend development and love tackling challenges involving data structures, algorithms, and systems design.

• Languages: Java, JavaScript, C++, Python
• Backend: Spring Boot, Node.js, Express.js
• Frontend: React.js, Tailwind CSS, EJS
• Databases: MongoDB, MySQL
• Tools: Git, GitHub, Postman, Docker, VS Code
• Other Interests: Data Structures & Algorithms, Design & Analysis of Algorithms (DAA)

Modern, high-performance portfolio featuring Framer Motion animations and dynamic project rendering. Deployed on Vercel.

A robust, enterprise-grade Task Management System built to fulfill the Software Engineering Assessment requirements for Track A (Full-Stack). This system allows users to securely register, log in, and perform full management of their personal tasks with a modern, responsive interface

MetroFlow AI is a high-performance 10-module engineering framework designed to quantify urban traffic "unreliability." It utilizes a C++ Physics Kernel for edge-computing data ingestion, a Python LSTM Neural Network for recursive 24-hour time-series forecasting, and an interactive JavaScript Dashboard. The system moves beyond average speed metrics to calculate the Buffer Index (BI) and Planning Time Index (PTI), providing deep insights into the economic impact of congestion shocks.

A multi-dimensional 10-module research framework designed to profile the performance gap between ECC-P521 and RSA-4096 standards. The system utilizes a Python-based benchmarking engine to evaluate the "Security-Speed-Sustainability" triad. By integrating Scikit-Learn for integrity validation (Confusion Matrix) and psutil for deep resource profiling, the project proves that ECC achieves a 100% verification rate while reducing energy consumption by 70%.

Real-time multiplayer chess game using Socket.io, Node.js, and Tailwind CSS. Allows two players to compete live with automatic room handling.

SCatch is a full-featured e-commerce web application built with Node.js, Express, MongoDB, and EJS. It allows users to browse products, manage carts and wishlists, and place orders via Razorpay payment gateway with signature verification and secure order storage. It also supports light/dark theme toggle, order history, and profile editing.

This repository contains a comprehensive pipeline designed to improve and evaluate Automatic Speech Recognition (ASR) for conversational Hindi. The project transitions from standard "rigid" string matching to a sophisticated Lattice-based evaluation system, ensuring that valid linguistic variations (synonyms, number formats, and spellings) are handled fairly.

Welcome to Moodly, your personal space to express thoughts, share moods, and connect with the vibe! Whether it’s a text snippet, a spontaneous update, or an image of your moment — Moodly lets you post it, like it, and live it.

• 🎖️ Built and deployed multiple full-stack applications
• 👨‍💻 Solved 500+ problems on coding platforms (Leetcode, GFG, Codeforces)
• 📊 Strong grasp on DSA and backend system design principles

• Competitive programming & coding challenges
• Football and instrumental music
• Learning new technologies & improving system scalability

• GitHub: @roni2668
• LinkedIn: [http://www.linkedin.com/in/ronimandal)

"Code is like humor. When you have to explain it, it’s bad." – Cory House