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Upnit-b/README.md

👋 Hi, I’m Upnit Banga

Software Engineer & Solutions Engineer with 12+ years of experience building, deploying, and integrating production-ready systems across web platforms, APIs, and distributed architectures.

I specialize in end-to-end delivery — from system design and backend architecture to frontend UX, cloud deployment, AI, and third-party integrations.

📍 Toronto, Canada 🇨🇦
🌎 Open to opportunities in Canada & the United States

⭐ Featured Work

📰 Publishing Platform — Production Architecture

Next.js · Express · PostgreSQL · PayPal · Docker · AWS

  • Production-grade publishing platform with admin workflows
  • Secure one-time payments via PayPal
  • Deployed on AWS EC2 with Docker and Nginx reverse proxy
  • Real-world client delivery (architecture & documentation only)

➡️ Repository: Publishing-Platform-Architecture

🧩 Microservices Backend — Social Platform Template

Node.js · Express · RabbitMQ · Redis · Docker

  • API Gateway with clear service boundaries
  • Event-driven communication using RabbitMQ
  • Redis-based caching layer
  • Designed for scalability, integrations, and onboarding

➡️ Repository: MicroServices-Backend

🛒 E-Commerce Platform — Production Template

Django · PostgreSQL · PayPal

  • Full product catalog, cart, checkout, and order lifecycle
  • PayPal payment integration (sandbox + live-ready flow)
  • Modular, reusable architecture for real deployments

➡️ Repository: E-Commerce-Platform-Template

⚙️ Systems Project — C++ File Server

C++ · POSIX Sockets · Multithreading

  • Concurrent multi-client file server
  • Binary file transfer with chunking
  • Focus on low-level networking and performance

➡️ Repository: FileServer

🤖 Supervisor Multi-Agent Workflow (LangGraph)

Python · LangGraph · LangChain · Groq (Llama 3.1) · Tavily Search · Pydantic

  • Designed a multi-agent orchestration system with a Supervisor node that dynamically routes tasks across specialized agents (Prompt Enhancer, Researcher, Coder)
  • Built a Validator agent as a quality gate that evaluates responses and loops back only on fundamentally incorrect outputs — minimizing redundant cycles
  • Integrated Tavily web search and Python REPL tool as agent-bound capabilities for grounded research and live code execution
  • Leveraged Pydantic structured outputs with with_structured_output() for type-safe, deterministic routing decisions across agent transitions

➡️ Repository: LangGraph-Multi-Agent-Workflow

🧠 Multi-Step RAG Pipeline (LangGraph)

Python · LangChain · LangGraph · Vector Databases · Embeddings

  • Designed and implemented a multi-step Retrieval-Augmented Generation pipeline with query decomposition, iterative retrieval, and cross-step synthesis
  • Built vector-based retrieval over embedded document chunks with re-ranking and context aggregation to improve answer quality for complex, multi-hop queries
  • Implemented structured LLM outputs for deterministic parsing and reliable downstream processing

➡️ Repository: RAG-LangGraph-Multi-Step-Pipeline

🧪 Additional Projects

  • Book-Management-REST-API — Backend fundamentals and API design patterns
  • AI-Recipe-Generator-Claude-API — LLM-powered web application
  • AI-Content-Generator — AI-driven content generation platform
  • Video-Streaming-Platform — Netflix inspired movie-streaming web application
  • Shopping-Platform-Template — Amazon inspired frontend e-commerce platform
  • Django-Auction-Platform — Auction platform for selling and buying artifacts
  • Django-Wikipedia-Platform — Encyclopedia platform for uploading and editing documents

🛠 Tech Stack

Languages
TypeScript, JavaScript, Python, C++

Backend & APIs
Node.js, Express, Django, FastAPI
REST APIs, Webhooks, OpenAPI / Swagger

AI & LLM Systems
LangChain, LangGraph, MCP
Embeddings, Vector Databases
RAG Pipelines

Databases & Caching
PostgreSQL, MongoDB, Redis

DevOps & Infrastructure
Docker, Docker Compose, AWS (EC2), Nginx

Tools & Integrations
Postman, PayPal APIs, CI/CD workflows

🔗 Connect with Me

Pinned Loading

  1. MicroServices-Backend MicroServices-Backend Public

    A scalable, event-driven microservices backend for a social media platform built with Node.js microservices architecture, featuring real-time communication between services, media handling using mu…

    JavaScript

  2. Publishing-Platform-Architecture Publishing-Platform-Architecture Public

    A production-grade publishing platform built with Next.js and Node.js, featuring a Medium-style editor, SEO-optimized content delivery, secure payments, and a Dockerized AWS deployment.

  3. E-Commerce-Platform-Template E-Commerce-Platform-Template Public

    This is a template for a deployed project. A production-ready e-commerce platform built with Django, supporting full product management, shopping cart, secure checkout using the PayPal REST API, us…

    Python

  4. Portfolio-Website Portfolio-Website Public

    A modern, minimal, and fully responsive developer portfolio built with Next.js, Tailwind CSS, Framer Motion, and shadcn/ui. Includes animated page transitions, a projects slider, resume/experience …

    TypeScript

  5. LangGraph-Multi-Agent-Workflow LangGraph-Multi-Agent-Workflow Public

    This repo demonstrates multi agent workflow in LangGraph with Supervisor and 4 sub-agents

    Python

  6. RAG-LangGraph-Multi-Step-Pipeline RAG-LangGraph-Multi-Step-Pipeline Public

    This repo demonstrates multi step reasoning for RAG with LangGraph v1

    Python