Vivekananda J — Portfolio

Summary

Aspiring Java Backend Developer with expertise in Core Java, Collections, JDBC, Spring MVC, Spring Boot, Hibernate, and SQL.
Experience building REST APIs, applying security best practices, and optimizing database queries.
Strong foundations in OOP, multithreading, design patterns, and clean code principles.
Good problem-solver, quick learner, and teamwork oriented with strong communication skills.

Core Java, Collections, OOP, Multithreading

Spring, Spring MVC, Spring Boot, Hibernate

JDBC, SQL (Joins, Views, Stored Procedures, Triggers, Query Optimization)

REST APIs, JSON, HTTP, Authentication, Validation

Git, Photoshop, IDEs, Build & Deployment

HTML5, CSS3, JavaScript (Vanilla)

Java, Spring Boot, Hibernate, MySQL

Designed and developed RESTful APIs for customer management, billing, payments and reporting dashboards.
Implemented authentication & authorization (role-based access) using Spring Security.
Used Hibernate for entity mapping with one-to-many and many-to-many relationships; optimized performance via lazy/eager loading and query tuning.
Generated monthly and yearly reports with complex SQL queries, used batch processing for invoice generation.
Integrated email notifications for billing reminders and payment receipts.

Spring Boot, REST API, MySQL, JavaScript

Frontend-backend application to allow users to create, update, delete, and view expense categories and transactions.
REST endpoints secured with JWT; validation and error handling implemented.
Data visualization: plotted charts of expenses over time using JS chart library.
Export functionality for transactions in CSV / PDF format.
Deployed the app on a cloud service or server (e.g. Heroku / AWS) with CI/CD pipeline (if applicable).

Spring MVC, JDBC, HTML/CSS

Built CRUD operations for employees (add/edit/delete/view) using Spring MVC and plain JDBC.
Form validation, error messages, and file upload feature (profile photo) handled at backend.
Search, sort, and pagination features for employee listing.

Spring Boot, PostgreSQL, Postman

A web application for managing events, including creation, registration, and attendance tracking.
REST APIs implemented for CRUD operations.
User registration and authentication with validation.
Event creation and management features for organizers.
Tested APIs using Postman for proper validation and error handling.

B.E in Computer Science | 64.3% 2019 – 2023

PUC | 65.6% 2018 – 2019

10th | 62.7% 2016 – 2017