Deva Varshini Chenji
Java Backend Developer • c*****************@gmail.com • +91*******313 • linkedin.com/••••• • drivetube.ai/•••••
Professional Summary
Java Backend Developer with 6 months of internship experience building RESTful services and backend modules using Java 8 and the Spring ecosystem. Strong foundation in Spring Boot, Spring Data JPA and Oracle-based persistence; designed layered architectures and authored REST APIs consumed by HTML5/CSS/JavaScript frontends. Experienced in unit testing with JUnit and Mockito, API validation using Postman, build automation with Maven and code-quality checks using SonarQube. Worked on a pharmacy billing solution and multiple academic backend projects focusing on inventory, booking and expense domains, delivering maintainable code, modular services and reliable data access. Comfortable using Git and Eclipse in Agile workflows and able to take ownership of API design, persistence modeling and backend testing to deliver production-ready services.
Technical Skills
Programming Language: Java,JavaScript,SQL
Frontend Technologies: HTML5,CSS
Backend Technologies: Spring,Spring Boot,Spring Data,JPA
Databases: Oracle
Version Control & Development Tools: Maven,Git
Testing & QA: JUnit,Mockito
API Testing & Performance Testing: JMeter
API & Integrations: Postman,RESTful APIs
Architecture & Design Patterns: Layered Architecture
DevSecOps & Security Automation: SonarQube
Project Management & Collaboration: Jira
Work Experience
Divith Techno Solutions
Bangalore, India
Full Stack Java Developer Intern
Jan 2024 – May 2024
Built backend services and APIs for a pharmacy billing and inventory web application supporting retail pharmacy transactions and stock management.
Tech Stack: Java 8, Spring Framework, Spring Boot, Spring Data JPA, Oracle, Postman, JUnit, Mockito, Maven, SonarQube
- Architected and developed core billing and inventory modules using Java 8 and Spring Framework to model transactions and product lifecycle for a pharmacy web app.
- Engineered RESTful APIs for billing, inventory and lookup endpoints using Spring Boot to standardize data exchange between frontend and backend.
- Implemented persistence and data access layers with Spring Data JPA and Oracle to ensure ACID-compliant storage of transactions and inventory states.
- Built unit and integration tests with JUnit and Mockito to validate service logic and repository behavior during development.
- Conducted API testing and debugging with Postman to validate request/response flows and fixed critical serialization and validation defects.
- Configured Maven builds and integrated SonarQube checks to enforce code quality and static analysis in the CI pipeline.
- Partnered with frontend engineers to integrate APIs consumed by HTML5/CSS/JavaScript UI and produced API documentation for seamless handoff.
Projects
Book Management System | 2023 – 2024
Tools Used: Java 8, Spring Boot, Spring Data JPA, Oracle, RESTful API Design, Postman, Git, Maven
- Architected and implemented backend services using Spring Boot and Spring Data JPA to manage book inventory and CRUD operations.
- Designed RESTful endpoints for search, create, update and delete operations to provide a clean API contract for frontends.
- Modeled relational schema and implemented Oracle persistence to maintain book metadata and availability status.
- Authored integration tests and executed API validation with Postman; managed source code with Git and project builds with Maven.
Smart Vehicle Service Booking & Tracking System | 2023 – 2024
Tools Used: Java 8, Spring Boot, RESTful API Design, Spring Data JPA, Postman, JMeter
- Engineered booking and tracking microservices using Spring Boot to handle appointment creation and status updates.
- Implemented REST APIs to expose booking endpoints and status queries for real-time tracking from client applications.
- Structured the application with a layered architecture to separate controller, service and repository responsibilities.
- Executed load and performance tests with JMeter to identify bottlenecks in booking flows and tuned repository queries accordingly.
Smart Expense Tracker API | 2022 – 2023
Tools Used: Java 8, Spring Boot, Spring Data JPA, RESTful API Design, Java Streams, JUnit, Mockito, Oracle
- Designed and implemented RESTful services for recording expenses, generating monthly summaries and category-based reports.
- Leveraged Java 8 Streams and Lambda expressions to implement efficient filtering and aggregation for reporting endpoints.
- Implemented robust exception handling and custom validators to enforce budget constraints and input correctness.
- Developed unit tests with JUnit and Mockito to validate business rules and repository interactions against Oracle persistence.
Education
Sri Venkateswara University, Tirupati
Master of Computer Applications (GPA: 8.2/10) • Tirupati, India • 2024 – 2026
Sri Venkateswara University, Tirupati
Bachelor of Science and Computers (GPA: 9.0/10) • Tirupati, India • 2021 – 2024
Certifications
SQL and Relational Databases 101 — IBM • Mar 2024
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