I'm a Backend Developer with 4+ years of professional experience specializing in backend engineering, RESTful APIs, database-driven applications, distributed systems, and AI-powered applications.

I build production-ready backend services and scalable applications using Python, FastAPI, Node.js, Express.js, MongoDB, PostgreSQL, Redis, Docker, and cloud technologies.

I also specialize in Generative AI, LLM applications, RAG pipelines, AI agents, tool calling, and LLM evaluation.

• 💼 4+ years of professional software development experience
• 🏢 Working at Taazaa Tech as part of the Product Development Team
• 🐍 Backend engineering with Python & FastAPI
• ⚡ Backend development with Node.js & Express.js
• 🔐 Secure API development using JWT, authentication & authorization
• 🗄️ Database development with MongoDB, PostgreSQL & MySQL
• ⚡ High-performance applications using Redis & caching
• 🐳 Containerized applications using Docker
• ☁️ Cloud and backend infrastructure using AWS
• 🤖 AI-powered applications using LLMs, RAG & AI Agents
• 🔗 LangChain, LangGraph & LLM tool calling
• 🧠 LLM evaluation, hallucination testing & AI quality engineering

Python • FastAPI • Node.js • Express.js • REST APIs • Async Programming • API Design • Authentication • Authorization

MongoDB • PostgreSQL • MySQL • Redis • SQLAlchemy • Mongoose • Database Design

LLM Applications • RAG • AI Agents • Tool Calling • LangChain • LangGraph • LLM Evaluation • Hallucination Testing • Vision AI • Prompt Engineering • Groq

AWS • Docker • Nginx • Linux • Git • CI/CD • Deployment • Reverse Proxy

AI-powered shopping assistant built with Python, Streamlit, LangChain, LangGraph, ChatGroq and SQLite.

Key capabilities:

• AI agent with tool-calling architecture
• Text-based product search
• Image-based product search
• Vision model integration
• SQLite-backed product retrieval
• Order management workflows
• Structured tool outputs
• Agent-driven decision making

Tech: Python LangChain LangGraph ChatGroq Streamlit SQLite

Secure REST API for personal expense management using Node.js, Express.js and MongoDB.

Key capabilities:

• User registration and authentication
• JWT-based authorization
• Secure password hashing using bcrypt
• Complete expense CRUD operations
• User-specific data isolation
• MongoDB persistence using Mongoose
• Protected API routes

Tech: Node.js Express.js MongoDB Mongoose JWT bcrypt

Backend Engineering
        │
        ├── Python / FastAPI
        ├── Node.js / Express
        ├── REST API Architecture
        ├── Authentication & Authorization
        ├── PostgreSQL / MongoDB
        ├── Redis & Caching
        ├── Docker & AWS
        │
        └── AI Backend Engineering
              ├── LLM Applications
              ├── RAG
              ├── AI Agents
              ├── Tool Calling
              ├── LangChain / LangGraph
              └── LLM Evaluation

📧 Email: amrraj80855@gmail.com

⭐ Building scalable backend systems and AI-powered applications.