Java backend intern

DUY-KHANH NGUYEN

Java Backend Developer Cloud Enthusiast Team Player

+ Tan Binh District, Ho Chi Minh City 038*-***-*** # *************@*****.***

§ github.com/supermanbi ï linkedin.com/in/duykhanh-java PROFESSIONAL SUMMARY

Highly motivated Java Backend Developer and recent Information Technology graduate from Van Lang University. Possesses a solid academic foundation combined with practical experience in build- ing Microservices using Spring Boot 3.x. Proven ability to implement secure authentication, optimize database performance, and automate workflows during internships at R2S Academy. Committed to technical excellence, Clean Code practices, and quick adaptation to professional development environ- ments.

TECHNICAL SKILLS

Programming Languages: Java (OOP, Multi-threading), SQL, JavaScript Backend Frameworks: Spring Boot 3.x, Spring Security, JPA, Hibernate, Node.js Databases & Caching: PostgreSQL, MySQL, MongoDB, Redis, Caffeine Tools & DevOps: Docker, GitLab CI/CD, Git (GitFlow), Flyway, Postman Development Practices: Microservices, RESTful API, JUnit 5, Mockito, SOLID WORK EXPERIENCE

Java Backend Intern R2S Academy Aug 2025 – Jan 2026

• Developed a multi-module Microservices system using Spring Boot 3.x and Java 17.

• Implemented secure JWT-based authentication and Role-based Authorization (RBAC).

• Integrated PostgreSQL for data persistence and managed database versioning using Flyway.

• Enhanced performance by implementing local (Caffeine) and distributed (Redis) caching.

• Automated deployment workflows using GitLab CI/CD pipelines and Docker containerization. Java Developer Intern Van Lang University March 2024 – June 2024

• Participated in the development of a course management system for internal university use.

• Collaborated with a team of 4 to design backend modules using Spring Boot and Hibernate.

• Designed and implemented RESTful APIs for course enrollment and grade management.

• Integrated MySQL database and wrote optimized SQL queries to improve response time.

• Provided technical support and assisted students during the system rollout phase. PROJECTS

User Access Management System R2S Academy Internship Aug 2025 – Jan 2026

• Architected a Microservices system consisting of Core, Auth-Service, and User-Service modules.

• Optimized database migrations with Flyway and ensured 100% data consistency.

• Automated the development lifecycle with GitLab CI/CD pipelines and Docker Compose.

• Ensured high code quality through Unit Testing (JUnit 5/Mockito) and SOLID principles. E-Commerce Backend System Capstone Project May 2025 – Aug 2025

• Developed a scalable RESTful API for an e-commerce platform using Node.js and Express.js. 1

• Designed and implemented business logic for product management and secure order processing.

• Managed flexible data structures using MongoDB and implemented secure authentication.

• Deployed the backend application to Firebase and ensured system stability through testing. Internal Course Management System Van Lang University March 2024 – June 2024

• Engineered a robust backend to handle course registrations and student exam scheduling.

• Redesigned the relational database schema to eliminate redundancy and resolve N+1 query issues in Hibernate.

• Solved data concurrency challenges by implementing custom validation logic to prevent overlapping exam timetables.

• Integrated Spring Security to manage multi-level user permissions for students, faculty, and admins. EDUCATION & CERTIFICATIONS

Van Lang University B.S. in Information Technology Graduated: Aug, 2025

• GPA: 3.18/4.0 (8.1/10)

• AWS Certified Cloud Foundations

• Teaching Assistant Certificate for Database Course

• Annual Merit-Based Scholarships awarded each semester (2021–2024) LANGUAGES

Vietnamese: Native proficiency English: Intermediate level (TOEIC 600) 2

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