Available for new projects

Building Scalable Backend Systems with Java & Spring Boot.

Hey, I'm Vaishnavi Raj, a Backend Developer passionate about REST APIs, microservices, and building performant LMS platforms.

About Me

I'm a Backend Developer passionate about building scalable REST APIs and microservices with Java and Spring Boot. Currently interning at Certifyo, I work on LMS platforms — from quiz modules and video delivery to database optimisation. Always eager to learn and grow, I'm looking for opportunities to contribute and innovate.

Phagwara, Punjab, India

Education

Lovely Professional University, Punjab, India2022 – Present

B.Tech — Computer Science And Engineering (CSE)Status: In Progress

Avadh International School, Ayodhya, Uttar Pradesh2021

Higher Secondary Education (Class XII)

Ayodhya Academy, Ayodhya, Uttar Pradesh2019

Secondary Education (Class X)

Experience

CertifyoSept 2025 – May 2026

Backend Developer InternRemote

Developed and integrated RESTful APIs using Java and Spring Boot for the LMS platform, supporting core workflows including course enrollment, content delivery, and user management.
Engineered the end-to-end Quiz Module — covering question bank design, attempt tracking, auto-scoring logic, and result APIs — enabling structured assessments for learners across the platform.
Designed and implemented video content delivery APIs, managing video metadata, playback endpoints, and server-side rendering logic to ensure smooth, reliable in-browser video streaming for course content.
Contributed to API architecture and design decisions across LMS backend services, defining request/response contracts and maintaining consistent standards for scalability and maintainability.
Optimised API response times by implementing pagination, response caching, and reducing redundant service calls resulting in noticeably faster load times across high-traffic LMS endpoints.
Improved PostgreSQL database performance and security by writing optimised JPA queries, adding targeted indexes on frequently queried columns, enforcing parameterised queries to prevent SQL injection, and applying role-based access controls at the database layer.

Achievements

2nd Place — Prompt Builder Hackathon — Organised by LPU & AWS, Phagwara. (Feb 2025)
Top 10 Finalists — State Level Hackathon — Organised by LPU, Phagwara. (Jan 2025)
Open Source Contribution Event 2024 — Contributed 4 merged pull requests. (Nov 2024)
GirlScript Summer of Code 2024 — Completed 10 open-source contributions. (Oct 2024)

Tech Stack

JavaC++JavaScriptTypeScriptSpring BootReactHTML5CSS3Tailwind CSSNode.jsExpress.jsMySQLMongoDBRabbitMQAWSDockerGitGitHubPostman

Projects

Smart Courier

Distributed Courier Management System

- Architected a production-grade distributed courier management system with independent Admin, Authorization, and Delivery microservices, ensuring high cohesion and loose coupling between bounded contexts.
- Engineered a centralized API Gateway with JWT-based authentication and Role-Based Access Control (RBAC), securing all inter-service communication across the platform.
- Developed a responsive React and JavaScript frontend, enabling real-time courier tracking, role-based dashboards, and seamless interaction with backend microservices.

Java Spring Boot RabbitMQ MySQL Docker React JavaScript

GitHub Live Site

ResumeX

AI-Powered Resume Analyzer

- Designed and built a fully responsive AI-powered resume analyzer, enabling users to upload, store, and evaluate resumes against job descriptions with intelligent, score-based feedback.
- Developed a candidate-to-role matching engine delivering actionable, prioritised recommendations that streamline recruiter workflows and improve hiring efficiency.
- Optimised application performance with Zustand for global state management and Vite for faster builds, achieving sub-second load times.

React TypeScript Tailwind CSS JavaScript

GitHub Live Site