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TheRJHub/README.md

👋 Hi, I'm Rajat Kumar Das

🚀 Full Stack Developer | Python (FastAPI) + Java (Spring Boot) | Building AI-Powered Systems

I'm a Full Stack Developer building end-to-end products — from database design to backend logic to the UI — with a growing focus on AI/LLM-powered systems.

I like writing clean, scalable code, designing systems that actually hold up under real traffic, and shipping things that solve real problems — not just tutorials.

📍 India 🔗 LinkedIn

🧠 What I Do

  • 🏗️ Design and build end-to-end full-stack + AI-powered applications
  • ⚙️ Build APIs using Python (FastAPI) and Java (Spring Boot)
  • 🔄 Build async, event-driven systems using Kafka, RabbitMQ & Celery
  • 🗄️ Work with MongoDB and SQL databases
  • 🤖 Build AI agents & workflows using LangGraph
  • 📱 Build responsive web (React) and mobile (React Native) UIs

🔭 Currently Working On

  • Full-stack + AI product development (Python/FastAPI + LangGraph)
  • Async, event-driven backend architecture (Kafka, RabbitMQ, Celery)
  • Improving system design & backend scalability

🌱 Currently Exploring

  • Advanced AI agent architectures (LangGraph, RAG)
  • DevOps — Docker & Kubernetes
  • Backend system design at scale

🛠️ Tech Stack

Languages Python Java JavaScript SQL

Backend FastAPI Spring Boot

AI / LLM LangGraph AI Agents

Data & Messaging MongoDB Kafka RabbitMQ Celery

Frontend React React Native HTML5 CSS3 Bootstrap

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