Hai Nguyen Vu
Recent IT graduate passionate about software quality and full-stack development.
About Me
As a Backend Developer and Full-stack Tester, I specialize in building scalable RESTful APIs (Java, Node.js) and robust databases. Leveraging deep SDLC/STLC expertise, I ensure flawless delivery by architecting end-to-end automation frameworks across Web, API, and Mobile platforms.
Mar 2026 - May 2026
NodeJS Developer
BRISWELL VIETNAM
Ho Chi Minh City
Project: Internet Subscriber Management & Billing Portal
Node.js
Express
Vue.js
Redmine
Nov 2025 - Feb 2026
Tester
AUTOMATION LAND
Ho Chi Minh City
Project: NFC Business Card Platform (Web) & Real Estate Exam Prep (Mobile)
Selenium
Appium
Jira
Flutter
Jul 2025 - Aug 2025
Java Developer
FUJINET SYSTEMS JSC
Ho Chi Minh City
Project: Business management system 'Intra-mart'
Java
Spring
Oracle 12c
Chroma DB
LangChain
Projects
Explore my latest work across different domains.
System Microservices Page Socials
Sep 2025 - Nov 2025
Spring Boot
Spring Security
PostgreSQL
Couchbase
Eureka
Kafka
Apache Flink
Redis
GraphQL
RESTful API
WebSocket
Elasticsearch
Graylog
React
Tailwind CSS
Cloudinary
Flickr
Spotify API
Docker
- Achieved a highly scalable and flexible microservices architecture, measured by high-speed query processing, by developing RESTful APIs and GraphQL.
- Optimized real-time data retrieval performance and significantly reduced the main database load, by integrating CDC with Apache Flink and Redis cache.
- Successfully built an asynchronous event-driven messaging and real-time notification system, by leveraging Kafka and WebSockets.
- Enhanced global search capabilities, measured by rapid user and post retrieval, by integrating Elasticsearch.
System Microservices Asset Management
Jun 2025 - Aug 2025
Spring Boot
Spring Security
Spring Cloud
PostgreSQL
PostGIS
CMDBuild
Kafka
Python
FastAPI
PyTorch (Stable Baselines 3)
React
Vite
Tailwind CSS
Material UI
Docker
- Ensured centralized routing and strict security, measured by seamless RBAC access control, by implementing an API Gateway with JWT authentication.
- Automated asset health evaluation processes, measured by minimized manual decision-making, by integrating AI and Reinforcement Learning (PyTorch, PPO).
- Achieved a seamless real-time asset management lifecycle, measured by immediate workflow notifications, by building an event-driven architecture using Apache Kafka and CMDBuild.
Stationery Management
Feb 2025 - May 2025
Java (Android)
React (TypeScript)
Spring Boot
Spring Security
MySQL
Firebase
RESTful API
MoMo API
Cloudinary
- Enhanced the mobile shopping experience, measured by seamless cart management and transactions, by developing a native Android app and integrating MoMo API.
- Optimized user authentication and system security, measured by zero unauthorized access, by deploying email OTP verification and Google Login.
- Personalised customer experiences, measured by increased product relevance, by implementing a search-history-based recommendation system and an image processing model.
AI Powered Movie Ticket Booking
Oct 2024 - Jan 2025
Java
Spring MVC
Hibernate
SQL Server
Python
Flask
TensorFlow/Keras
NLTK
ChromaDB
JSP
Bootstrap
RESTful API
JUnit
- Ensured absolute data integrity during ticket reservations, measured by zero duplicate seat bookings, by implementing highly effective concurrency handling mechanisms.
- Improved automated customer support efficiency, measured by accurate query resolutions, by training and integrating an AI Chatbot using TensorFlow, NLTK, and ChromaDB.
- Optimized system query performance, measured by rapid response times, by designing a normalized SQL Server database and crafting complex stored procedures and triggers.
Tech Stream Agent (AI-Powered News Pipeline & RAG Bot)
Apr 2026 - Present
Google Apps Script
Google Gemini API
NewsAPI
Supabase (pgvector)
Telegram Bot API
Cloudflare Workers
Google Sheets
- Achieved a fully automated news aggregation system, measured by the daily delivery of HTML email digests, by integrating Google Apps Script, NewsAPI, and the Gemini API.
- Elevated semantic search and contextual Q&A capabilities, measured by accurate real-time responses, by deploying a Retrieval-Augmented Generation (RAG) architecture using Supabase pgvector and a Telegram Bot.
- Ensured robust system stability exceeding native execution limits, measured by a 100% pipeline success rate, by engineering exponential backoff retries, Cloudflare proxying, and trigger chaining.
Real-time System Monitoring Dashboard
Mar 2026 - Jun 2026
Node.js
Express.js
Next.js
React
Tailwind CSS
Recharts
Server-Sent Events (SSE)
Docker
GitHub Actions
AWS EC2
Jest
Vitest
Playwright
- Achieved low-latency hardware monitoring capabilities, measured by a real-time updating dashboard, by utilizing Server-Sent Events (SSE) within a Next.js monorepo architecture.
- Accelerated the application deployment lifecycle, measured by fully automated releases with zero downtime, by establishing CI/CD pipelines with GitHub Actions, Docker, and AWS EC2.
- Ensured high codebase reliability and UI stability, measured by comprehensive coverage of core feature flows, by deploying a multi-tiered testing framework combining Jest, Vitest, and Playwright.
Random User Management (E2E Quality)
Dec 2025 - Jan 2026
Next.js
Node.js
Express
PostgreSQL
Java
Selenium
RestAssured
TestNG
GitHub Actions
- Finalized a robust user management system using a Full-stack architecture, measured by seamless CRUD operations, by combining Next.js UI, Express.js API, and PostgreSQL.
- Achieved 100% reliability for core business flows, measured by comprehensive Allure execution reports, by deploying a multi-tiered automation testing framework.
- Prevented critical system failures and security breaches early on, measured by zero data leakage, by designing diverse test variations covering UI (Selenium), API (REST Assured), network latency, and SQL Injection.
Java Test Automation Frameworks Suite
Nov 2025 - Present
Java 17
Selenium 4
Appium 3
RestAssured
Maven
TestNG
Allure Report
Log4j2
- Established a comprehensive and highly scalable automated testing foundation for Web, API, and Mobile, measured by seamless CI/CD integration, by designing 3 independent frameworks from scratch.
- Increased code reusability by 40% and simplified maintenance, measured by significantly reduced script update times, by implementing the Page Object Model (POM) and Factory Patterns.
- Minimized test suite execution time, measured by drastically reduced feedback loops, by implementing ThreadLocal for safe parallel execution.
- Accelerated the debugging process, measured by immediate failure identification, by integrating Allure Report and Log4j2 for automated reporting and screenshots.
Technical Skills
A comprehensive overview of my technical expertise across the full stack and quality assurance.
Backend Development
Node.jsExpress.jsJavaSpring BootSpring MVCPythonTypeScriptMicroservices
Testing & QA
Selenium WebDriverRestAssuredAppiumPlaywrightTestNGJUnitJestVitestAllure ReportPostmanManual Testing
Database
PostgreSQLMySQLSQL ServerCouchbaseChroma (Vector DB)RedisElasticsearch
Infrastructure & Tools
DockerGitHub ActionsAWS EC2KafkaFirebaseJiraRedmineGit
Frontend Development
ReactJSNext.jsVue.jsTailwind CSSBootstrapHTML & CSS