Aspiring Java Developer with Spring Boot Experience

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OBJECTIVE

EDUCATION

Posts and Telecommunications Institute of Technology 10/2022 - 06/2027

Major : Software Technology

GPA: 3.1/4.0 (Most recent semester)

CERTIFICATION

TOEIC 845 3/2026

IELTS 5.5 3/2022

SKILLS

Languages: Java, C++, SQL,Python

Framework: Spring Boot, Spring Security, Spring Data JPA Databases: MySQL, PostgreSQL, MongoDB, Redis

Tools: Git, Postman, Swagger, Nginx

Concepts: RESTful APIs, JWT, OOP, DI, SOLID

Cloud & Devops: Docker, Docker Compose, AWS (EC2), Vercel Professional Skills: Team collaboration, Communication skills, Problem solving PROJECTS

BEBOOKING - BOOKING HOTEL MANAGEMENT SYSTEM 01/2026 - 04/2026 Developed REST APIs in Java 21 / Spring Boot for hotels, search, bookings, payments, reviews, and reception flows using Spring Data JPA and PostgreSQL .

Implemented stateless authentication with JWT (access/refresh), Spring Security resource server setup, BCrypt password hashing, and Redis token blacklist on logout.

Integrated SendGrid for registration verification and payment-success notification emails. Designed booking logic with per-day availability, multi room-type line items, and BookingRooms for physical room assignment at check-in.

Implemented safe concurrent reservations using Redisson distributed locks and atomic per-day reserve/release inventory operations.

Developed payment timeout mechanism using Redis TTL keys and a key-expiry listener to auto-cancel PENDING bookings and release inventory.

Integrated VNPay (sandbox) including payment URL creation, return handling, and IPN processing to confirm bookings. Implemented post-stay reviews with Cloudinary image uploads and server-side hotel rating updates (include a smoothed aggregate score).

Optimized booking-domain architecture with DTOs, mappers, and structured error handling for consistent API responses. Orchestrated AWS EC2 backend via Docker Compose for environment consistency; hosted frontend on Vercel for optimized edge delivery.

Link Git: https://github.com/giabaod1nh-spec/HotelBookingBackEnd Live Demo: https://hotel-booking-fe-one.vercel.app/

© Joboko.com

BAO DINH GIA

Backend Developer

091******* ***************@*****.*** https://github.com/giabaod1nh-spec www.linkedin.com/in/đinh-gia-bảo-114403254 Proactive Backend Developer Intern with a strong willingness to learn and hands-on experience developing Java/Spring Boot applications. Seeking to contribute to a professional environment where I can leverage my communication skills and technical foundation to build reliable systems.