I'm a passionate Full-Stack Developer from Mesra, JH, who loves building innovative web applications and solving complex problems through code. Currently pursuing my studies while actively developing projects that make a difference.

• 🔭 Currently working on: AI-powered collaborative tools and Chess4Nerds mobile version
• 🌱 Learning: Advanced React patterns, AI/ML integration, and React native
• 👨‍💻 Interested in: Web development, Real-time Collaboration, and Interactive Applications
• 📫 Reach me: subhankarsatpathy69@gmail.com

Tech Stack: TypeScript, React, Node.js, Yjs (CRDTs), WebRTC, WebSockets, Redis

• Developed a collaborative whiteboard that converts unstructured brainstorming into actionable outputs, reducing manual redrawing and transcription
• Designed CRDT-based synchronization (Yjs) for eventual consistency and hybrid transport (WebRTC with WebSocket+Redis fallback) for low-latency collaboration
• Integrated a multimodal AI assistant to generate diagrams, summaries, and images from natural language prompts and auto-embed them with smart layouts
• ⭐ 2 stars

Tech Stack: TypeScript, React, Node.js, WebSockets, Redis, PostgreSQL

• Implemented real-time room-scoped state management with presence, seamless reconnects, and horizontal scaling using Redis pub/sub
• Built matchmaking, transactional persistence (Postgres) with idempotent writes, Elo ratings, leaderboards, durable match history, and rate-limited in-game chat
• Added vs-computer mode with an embedded engine and server-authoritative move validation
• ⭐ 1 star

Tech Stack: React, Node.js, Express, MongoDB, JWT | Live Demo

• Developed a full-stack finance app with RESTful APIs, secure JWT authentication, server-side validation, and CRUD transactions
• Delivered interactive spending charts, one-click Excel export, and a responsive UI for mobile and desktop
• ⭐ 2 stars

Interactive PDF Annotation Tool

• Upload, view, highlight, and annotate PDF documents
• Persistent storage for annotations
• Built with TypeScript and modern web technologies

Multi-tenant Notes Application

• Role-based access control system
• Scalable SaaS architecture with TypeScript
• Full authentication and authorization flow

• 🔥 Competitive Programming: Learning advanced DSA patterns and giving contests regularly on Leetcode and Codeforces
• 🚀 Open Source: Contributing to community projects and repositories
• 🎮 Personal Projects: Enhancing Chess4Nerds for smaller screens and integrating Ai in Scriblio
• 💡 Real-time Collaboration: Exploring advanced WebRTC and CRDT implementations

I'm always open to discussing new opportunities, collaborating on interesting projects, or just having a chat about technology!