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sumeet57/README.md

👋 Hey, I'm Sumeet Umbalkar

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Full Stack Developer • Backend Engineer • SaaS Builder

I build scalable web applications, realtime systems, backend infrastructure, and developer tools.

I'm particularly interested in backend engineering, realtime communication, system design, AI agents, and building products from 0 → 1.

🚀 What I Build

  • ⚡ High-performance backend systems
  • 🔄 Realtime & WebSocket applications
  • 📈 Scalable SaaS products
  • 🤖 AI agents & developer tooling
  • 🧩 Open-source libraries
  • 🛠️ Full-stack products from idea to production

🛡️ PayGuard

Agentic Payment Security & Orchestration Runtime for Razorpay

PayGuard is a security runtime that allows AI agents to interact with payment infrastructure while keeping payment execution deterministic and auditable.

It separates AI decision-making from transaction enforcement through policy checks, risk analysis, approvals, and execution controls.

Documentation: https://payguard.sumeet.app

Repository: https://github.com/sumeet57/payguard

🎮 Epic Tambola

Realtime Multiplayer Tambola Platform

Lead Engineer responsible for the end-to-end development of the platform using MERN and Socket.IO.

  • ⚡ Realtime multiplayer gameplay
  • 👥 Rooms supporting up to 500 players
  • 🔄 WebSocket-based communication
  • 🎟️ Automated ticket generation
  • 🏆 Configurable winning patterns
  • 🔐 Server-side claim validation
  • ☁️ Cloud load testing and deployment

Live: https://epictambola.com

🏢 Labgineer

Engineering Platform & Marketplace

Founder of Labgineer, an engineering-focused platform for technical projects, engineering resources, and future developer-focused products.

Built and managed the platform end-to-end, including the MERN architecture, backend, payment integration, deployment, and customer workflows.

Website: https://labgineer.com

⚡ LiWebJS

Lightweight Realtime Communication Framework for Node.js

An open-source WebSocket framework created to understand and build realtime communication infrastructure from first principles.

  • Native WebSocket transport
  • Rooms & namespaces
  • Event-based communication
  • Authentication middleware
  • Redis integration
  • Horizontal scaling support
  • State synchronization

Documentation: https://liwebjs.sumeet.app

Repository: https://github.com/sumeet57/liwebjs

💻 Tech Stack:

JavaScript TypeScript Go Python C++ React Vite TailwindCSS React Router NodeJS Express.js Socket.io WebSocket MongoDB Redis PostgreSQL Docker Nginx Google Cloud AWS Git GitHub Postman

🌱 Currently Exploring

  • Go for high-concurrency backend systems
  • Distributed systems
  • AI agents & agent infrastructure
  • Open-source AI
  • Realtime system architecture
  • Backend performance optimization

🌐 Find Me

Portfolio: https://sumeet.app

GitHub: https://github.com/sumeet57

LinkedIn: https://linkedin.com/in/sumeet-umbalkar

Email: hello@sumeet.app


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  1. PayGuard PayGuard Public

    PayGuard is an open-source security runtime layer that enables autonomous AI agents to execute transactions.

    JavaScript

  2. liwebjs liwebjs Public

    Lightweight utilities for scalable real-time web applications.

    TypeScript 1 1