REST API Development
Build secure Spring Boot APIs with JWT auth, RBAC, and clean service layers.
DatDev
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.
Open to opportunities
Java Backend Developer (Fresher) · Thu Duc, Ho Chi Minh City
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
0373843363Role
Java Backend Developer (Fresher)
Availability
Open to opportunities
Education
FPT University
Software Engineer
2022 - 2026
Expected graduation 2026
Languages
English
Basic Working Proficiency (TOEIC 550)
Japanese
Basic Proficiency (JLPT N5)
What I Do
From schema design to production APIs.
Microservices
Design service boundaries, API Gateway, Eureka discovery, and Kafka event flows.
Database & Caching
Model data with PostgreSQL/MySQL and speed reads with Redis caching.
DevOps & Observability
Dockerize services, automate CI/CD, and monitor with Prometheus and Grafana.
Tech Stack
Languages, Spring Boot, databases, messaging, and DevOps tools from my CV.
Backend
Java
Spring Boot
Hibernate
Maven
Node.js
Python
FastAPI
REST / PostmanDatabase
PostgreSQL
MySQL
MongoDB
Redis
SQLMessaging
Apache KafkaDevOps
Docker
GitHub Actions
Nginx
Linux
AWS
GCP
Prometheus
Grafana
GitFrontend
React
TypeScript
HTML
CSSTools
IntelliJ IDEAExperience
Hands-on backend work on microservices, APIs, and production systems.
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.
Featured Projects
SmartMart and DUPSS from my CV, with real GitHub links.
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
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
Let's build something solid
Open to fresher Java backend roles and collaborations. Reach out by email, phone, or LinkedIn.