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karanhimadri/README.md

👋 Hi, I'm Himadri Karan

Full-Stack & AI Solutions Developer | Building end-to-end web platforms & AI-powered applications

📍 Kolkata, India

📫 Connect With Me

Email Portfolio LinkedIn Resume

🔥 About Me

  • 🌐 Full-stack developer experienced in React, Next.js, Spring Boot, FastAPI, Node.js
  • 🤖 Worked hands-on with LLMs, RAG pipelines, vector DBs, embeddings & AI-powered UX
  • 🛠 Skilled at scalable backend APIs, microservices, and cloud deployments (Docker, Render, Railway)
  • 🔒 Strong focus on security (JWT, RBAC, OAuth2, OTP-verification)
  • 🎯 Passionate about AI-driven innovation, problem-solving, and creating impactful user experiences

🛠️ Tech Stack

Languages
Python • Java • JavaScript • TypeScript • SQL

Frontend
React.js • Next.js 15 • Tailwind CSS • Responsive Design

Backend
FastAPI • Spring Boot • Express.js • REST APIs • Microservices

AI / RAG
Pinecone • Cohere • Google Gemini LLM • Semantic Search

Databases
MySQL • MongoDB • Redis

Cloud & DevOps
Docker • GitHub Actions • Render • Railway • Netlify • AWS (Basics)

🚀 Featured Projects

🧠 RAG Chatbot

Multi-domain AI Assistant using FastAPI, Next.js, Pinecone, and Gemini LLM.

  • Reduced response latency from 15s → 7s via optimized retrieval
  • Integrated Supabase Auth & Redis-based credit tracking
  • Supports contextual Q&A across Education, Finance, Healthcare, Environment, Agriculture

🏥 Prescripto – Healthcare Platform

Full-stack healthcare management system with Spring Boot + React + MySQL.

  • Role-based access: patients, doctors, admins
  • Razorpay payments with 15% fewer failed transactions
  • Dockerized & deployed on Render with 90%+ uptime

🔑 MERN Authentication Microservice

Production-ready authentication microservice using Express, MongoDB, JWT.

  • Handles 1K+ daily login requests (testing)
  • OTP-based email verification → reduced fake accounts by 35%
  • Configured environment-specific production builds

📄 KnowYourPDF

Full-stack AI app that lets users chat with PDFs using LLM integration.

  • Upload PDFs & ask contextual questions
  • Built with React, Express, Google Generative AI, Nodemailer

🏆 Certifications & Achievements

  • 🎓 AWS Academy Graduate – Cloud Foundations (2025)
  • 📚 Agile Software Development for Enterprise Systems – OpenLearn (2025)
  • ☁️ Microsoft Cloud & Networking Foundations (2023)
  • 🏅 Google Solution Challenge – GDG on Campus (Hack2Skill, 2025)

📫 Let’s Connect

💼 LinkedIn • 🌐 Portfolio • 📧 Email

✨ Open to internships, full-stack roles, and AI-focused opportunities!

Pinned Loading

  1. AuthWatch AuthWatch Public

    A robust MERN authentication microservice with secure user registration, login, email verification, and password reset, featuring Swagger API documentation and production-level observability via Pr…

    JavaScript 1

  2. Codelive Codelive Public

    CodeLive – A real-time collaborative code editor for seamless pair programming, remote interviews, and team coding sessions. Built with React, Node.js, Yjs, and Monaco Editor.

    JavaScript 1

  3. Prescripto Prescripto Public

    A online Platform for patients to book appointments, doctors to manage earnings and schedules, and admins to oversee the platform — built with secure authentication, real-time features, and online …

    JavaScript 1

  4. RAG-Based-ChatBot RAG-Based-ChatBot Public

    A complete full-stack Retrieval-Augmented Generation (RAG) system with modern web interface and intelligent backend, delivering specialized AI assistance across multiple domains.

    JavaScript 2

  5. stock-price-predictor stock-price-predictor Public

    A machine learning project that predicts stock closing prices using historical data and Linear Regression models.

    Python

  6. Flood-Risk-Analysis Flood-Risk-Analysis Public

    Climate Risk & Disaster Management — Flood Risk Analysis, A concise exploratory and feature-focused analysis of regional/global flood risk drivers

    Jupyter Notebook