DatDev · Java Backend Developer

Hi, I'm Nguyễn Thành Đạt

Java Backend Developer (Fresher)

Fresher Java Backend Developer with ~2 years freelance experience building REST APIs, secure auth, and scalable Spring Boot services.

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Open to opportunities

Java Backend Developer (Fresher) · Thu Duc, Ho Chi Minh City

[ 01 // PROFILE ]

About Me

Fresher Java Backend Developer with hands-on experience in building REST APIs, secure authentication systems, and scalable backend services using Java and Spring Boot. About 2 years of freelance backend work. Seeking an opportunity to contribute to real-world products, strengthen skills in databases, system design, and distributed systems, and grow into a professional Backend Developer.

Years Freelance

Projects

Microservices

Location

Thu Duc, Ho Chi Minh City

Phone

0373843363

Role

Java Backend Developer (Fresher)

Availability

Open to opportunities

thanhdatnguyen312@gmail.com

Education

FPT University

Software Engineer

2022 - 2026 · Expected graduation 2026

Languages

English

Basic Working Proficiency (TOEIC 550)

Japanese

Basic Proficiency (JLPT N5)

[ 02 // SERVICES & EXPERTISE ]

What I Do

From relational schema design and authentication to production-ready scalable APIs.

/01

REST API Development

Build secure Spring Boot APIs with JWT auth, RBAC, and clean service layers.

/02

Microservices

Design service boundaries, API Gateway, Eureka discovery, and Kafka event flows.

/03

Database & Caching

Model data with PostgreSQL/MySQL and speed reads with Redis caching.

/04

DevOps & Observability

Dockerize services, automate CI/CD, and monitor with Prometheus and Grafana.

[ 03 // TECH STACK & ARSENAL ]

Technical Arsenal

Languages, Spring Boot ecosystem, relational/NoSQL databases, messaging, and DevOps tools.

Backend

Java

Spring Boot

Hibernate

Maven

Node.js

Python

FastAPI

REST / Postman

Database

PostgreSQL

MySQL

MongoDB

Redis

SQL

Messaging

Apache Kafka

DevOps

Docker

GitHub Actions

Nginx

Linux

AWS

GCP

Prometheus

Grafana

Git

Frontend

React

TypeScript

HTML

CSS

Tools

IntelliJ IDEA

[ 04 // CAREER TIMELINE ]

Experience & Journey

Hands-on freelance backend development, microservices architecture, and production APIs.

08/2025 - 12/2025

3 months

08/2025 - 12/2025 · 3 months

Backend Developer Intern

FPT Software

Developed a microservices-based Laboratory Information System (LIS) with 9 services for core laboratory workflows (team of 5).
Built an API Gateway with JWT authentication, request filtering, and Eureka service discovery.
Designed event-driven flows with Apache Kafka and an HL7 v2.5.1 pipeline for laboratory result processing.
Integrated VNPT eKYC and Cloudinary, and applied polyglot persistence across services.
Containerized with Docker Compose, automated delivery with GitHub Actions, and added Prometheus/Grafana observability.

2024 - Present

~2 years

2024 - Present · ~2 years

Freelance Backend Developer

Freelance

Delivered backend APIs and integrations for client projects using Java, Spring Boot, and SQL databases.
Built authentication, CRUD modules, and third-party integrations for small-to-medium products.
Collaborated directly with clients on requirements, deployment, and iterative delivery.

[ 05 // FEATURED WORKS ]

Featured Projects

SmartMart and DUPSS from my CV, with real GitHub repositories and architecture documentation.

Full-Stack Developer

SmartMart - AI-Powered Retail Management

Full-stack retail system (POS, inventory, purchasing, finance) with RBAC, demand forecasting, Gemini AI assistant, and a promotion engine with 6 discount types.

Java 21Spring Boot 3PostgreSQLRedisKafkaFastAPIReactDocker

Source Code

Back-End Developer · 12/05/2025 - 18/07/2025

Drug Use Prevention Support System

Public site, admin portal, and backend API for education, counseling, screening surveys, AI chatbot, and consultation booking with video calls.

Java 21Spring BootJWTOAuth2MySQLSpring AIReactDockerGCP

Source Code

[ 06 // GET IN TOUCH ]

Let's Build Scalable Systems

Open to fresher Java backend roles, Spring Boot microservices engineering, and technical collaborations. Reach out directly or send a message.

thanhdatnguyen312@gmail.com

Phone

0373843363

Location

Thu Duc, Ho Chi Minh City

Status

Open to opportunities