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niraj080-er/README.md

Hi 👋, I'm Niraj Kumar

⚡ Backend Engineer | 🤖 AI Systems & LLM Orchestration

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🧠 Engineering Focus

  • 🚀 Scalable Backend Systems & Distributed Architectures
  • 🤖 LLM-powered Applications & AI Agents
  • 🔄 Event-driven systems with strong consistency patterns
  • ⚙️ Performance, reliability, and system design

⚙️ Backend & Systems Engineering

  • Languages: Java, Python, SQL
  • Frameworks: Spring Boot, FastAPI
  • Communication: REST APIs, gRPC
  • Architecture: Microservices, Distributed Systems

🏗️ System Design & Architecture

  • Event-Driven Architecture
  • CQRS
  • Saga Pattern
  • Outbox Pattern

🤖 AI / LLM Engineering

  • Frameworks: LangChain, LangGraph
  • Concepts: Prompt Engineering, LLM Orchestration, Multi-Agent Systems
  • Models: OpenAI, Gemini, Anthropic
  • Protocol: Model Context Protocol (MCP)

🗄️ Data, Streaming & Caching

  • PostgreSQL, MySQL
  • Redis
  • Apache Kafka
  • Debezium (CDC)

🛠️ DevOps & Tooling

  • Docker, Git, Maven, Jenkins
  • Keycloak (Auth & RBAC)

🧪 Testing

  • Unit Testing
  • Mockito

🚀 Highlight Projects

🔹 AI-Powered Backend Orchestration System

  • Built LLM-driven workflow engine using LangGraph
  • Integrated multiple models (OpenAI + Gemini + Anthropic)
  • Implemented agent-based decision making
  • Used Redis + Kafka for async processing

🧩 Architecture

flowchart LR
A[Client Request] --> B[API Gateway]
B --> C[LangGraph Agent]
C --> D[LLM Router]
D --> E[OpenAI / Gemini / Anthropic]
C --> F[Redis Cache]
C --> G[Kafka Events]
G --> H[Worker Services]
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  1. mcp-ai-agent mcp-ai-agent Public

    LLM-powered agent that dynamically selects and executes MCP tools

    Python 1 2

  2. Spring-data-redis Spring-data-redis Public

    Spring Data Redis, which provides the abstractions of the Spring Data platform to Redis — the popular in-memory data structure store. Redis is driven by a keystore-based data structure to persist d…

    1

  3. kafka_error_handling kafka_error_handling Public

    Java 1

  4. Transactional-outbox-pattern Transactional-outbox-pattern Public

    Java

  5. Cab-booking-Application- Cab-booking-Application- Public

    Java

  6. spring-interview-questions spring-interview-questions Public

    Welcome to the Spring Interview Questions repository! This repository serves as a valuable resource for preparing for interviews on the Spring Framework. It offers an extensive collection of questi…

    5 1