Greetings! 👋🏻

I'M NANDHAKUMAR NAGARAJ

Mastering the Java Full Stack

I am a dedicated Developer with expertise in designing and deploying production-grade web applications using Spring Boot, Angular, and SQL databases.

I specialize in architecting RESTful APIs with secure JWT-based authentication, database optimization, and cloud-native deployments with Docker.

2+

Years Exp

10+

Projects

50+

Mentees

View Works Get Resume

Professional Skillset

Java

Spring Boot

Angular

TypeScript

PostgreSQL

MySQL

Spring Security

Docker

Git

Microservices

Professional Experience

Full Stack Java Developer (Freelance)

Dec 2025 – Present

Live Client Project - Financial Analytics & Invoice Sync Platform

Architected backend services using Spring Boot following layered architecture.
Designed secure JWT-based authentication and multi-role authorization.
Integrated Xero Accounting API for automated invoice synchronization.
Optimized database queries and indexing, improving response time by ~40%.
Deployed applications to cloud with Docker-based setup.

Full Stack Java Developer & Technical Trainer

Dec 2024 – Nov 2025

Nirmaan Organization

Designed and developed multiple role-based web applications using Spring Boot & JPA.
Led backend API development and implemented secure data handling.
Mentored 50+ junior developers on API design, Git workflows, and best practices.
Built systems like Attendance Tracking, Quiz Management, and Feedback Portals.

Junior Java Full Stack Developer (Apprenticeship)

Jul 2024 – Nov 2024

Tata STRIVE

Developed Cricket Event Management System in an Agile team.
Implemented secure authentication using Spring Security + JWT.
Designed normalized relational database schemas.
Participated in sprint planning, code reviews, and testing.

Selected Projects

A showcase of my recent production-grade applications and APIs.

Financial Analytics & Invoice Platform

Live production system with secure REST APIs, role-based access, and Xero API integration.

Spring Boot Angular PostgreSQL

Source Live Demo

E-Commerce Product Catalog API

Robust backend with pagination, search, and filtering. Clean API design with validation & error handling.

Spring Boot Spring Data JPA MySQL

Source

Online Quiz Management System

Secure role-based platform handling high concurrency for educational assessments.

Spring Boot Angular JWT

Source

Attendance Management System

Secure role-based platform handling high concurrency for educational assessments.

Spring Boot Angular JWT

Source

Appointment Booking System

Streamlined platform for managing and scheduling appointments with ease and efficiency.

JavaScript PostgreSQL

Source Live Demo

Isolutionsfin

Enterprise-grade financial solutions portal. (Providing lifetime maintenance)

HTML CSS JavaScript

Source Live Demo

IAT Project

Internal Assessment Tracking system designed for educational institutions to monitor student progress.

HTML CSS JavaScript

Source Live Demo

Education

B.Tech – Information Technology

SRM Valliammai Engineering College

Anna University | CGPA: 8.3 / 10

Certifications

Java & Spring Framework – Codecademy
Angular Complete Guide – Codecademy
SQL for Data Analysis – Codecademy