Open to Engineering Opportunities • Backend, AI, Mobile & Full-Stack

Hi, I'm Nguyen Danh Huy

> Software Engineer | Backend • AI Systems • Mobile & Full-Stack

Bridging robust Java Spring Boot Modular Monoliths with production-grade RAG AI Architectures, Vector Databases, and scalable cross-platform client ecosystems (Flutter & React).

Explore Projects

Hanoi, Vietnam 0866 046 581 FPT University (Software Engineering)

huy@devbox: ~/profile.sh

$ cat developer_profile.json

{
  "name": "Nguyen Danh Huy",
  "role": "Software Engineer",
  "focus": "Backend, AI Systems & Cross-Platform Development",
  "education": {
    "school": "FPT University",
    "major": "Software Engineering",
    "degree": "Bachelor of Science"
  },
  "core_stack": [
    "Java 21", "Spring Boot 3.5", 
    "PostgreSQL + pgvector", 
    "Docker", "Flutter", "React"
  ],
  "production_metrics": {
    "use_cases_delivered": 88,
    "rag_triage_accuracy": "High / MOH Compliant",
    "fall_detection_latency": "Real-time (IMU)"
  }
}

$ systemctl status engineering_mindset

ACTIVE (RUNNING) — Enterprise-grade quality, zero shortcuts.

88+

Functional Use Cases

Across 9 distinct domains in CareBridge

Full-Stack Platforms

CareBridge (MECHP) & HeyKid Monorepo

Core Business Domains

Access, AI, Teleconsultation, IoT Safety...

100%

Production SDLC Gate

RS256 JWT, RAG, WebRTC, Sensors

Engineering Focus

Core Competencies & Engineering Philosophy

Building resilient backend foundations, intelligent AI retrieval pipelines, and seamless cross-platform client ecosystems.

Backend, Architecture & Reliability

Systems & Architecture

Dedicated to building enterprise-grade, maintainable software systems with a strong foundation in Java Spring Boot, PostgreSQL, Modular Monoliths, and Docker CI/CD:

Enforcing strict architectural boundaries, clean code conventions, and automated test-driven flows.
Implementing robust transaction handling, asymmetric security (RS256 JWT rings), and schema migration versioning.
Designing scalable REST APIs and high-efficiency cloud media pipelines (S3 Presigned URLs to Cloudflare R2).

AI Integration & Cross-Platform Clients

AI, Mobile & Web

Bridging intelligent AI capabilities with production user experiences across mobile and web platforms:

End-to-end RAG AI Pipelines integrating Google Gemini, n-gram hybrid search, and pgvector embeddings.
Automated AI Content Moderation, semantic analysis, and on-device STT/TTS interaction flows.
Cross-platform mobile applications in Flutter (IMU sensors, real-time WebRTC, GIS Maps) paired with reactive React administrative portals.

Technical Arsenal

Skills & Architecture Capabilities

Practical experience honed through enterprise-grade graduation projects, internships, and production-like implementations.

☕

Backend & Microservices

Core Strength

Java 21 Spring Boot 3.5 RESTful APIs Spring Security RS256 JWT Ring Modular Monolith Flyway Migrations Servlets & JSP Apache Tika

Architected 88 use cases in a Modular Monolith with clean boundary separation, asymmetric JWT key rotation, and automated schema migrations.

🧠

AI & RAG Architecture

High Growth Domain

RAG Pipeline Google Gemini API pgvector n-gram Hybrid Search LangChain Python FastAPI Semantic Moderation On-Device STT/TTS Google MediaPipe

Integrated hybrid vector + lexical retrieval on clinical guidelines for medical triage, AI safety content moderation, and speech interaction flows.

📱

Frontend & Mobile Clients

Omnichannel Experience

Flutter (Dart) React 19 (TypeScript) Vite TanStack Query GoRouter Sensors Plus (IMU) ZegoCloud WebRTC HTML5 / CSS3

Built cross-platform Flutter mobile applications with hardware sensor integration (accelerometer/gyroscope) and responsive React admin web portals.

☁️

Databases, Cloud & DevOps

Reliability & Deployment

PostgreSQL 16+ Supabase SQL Server Cloudflare R2 AWS S3 SDK Docker & Compose GitLab CI/CD GitHub Actions Git Flow

Configured zero-bandwidth direct uploads using S3 presigned URLs, containerized microservices via Docker Compose, and automated CI/CD pipelines.

Featured Work

Production-Grade Engineering Projects

Deep technical implementations with real architectures, code repositories, and measurable outcomes.

Graduation Project • Flagship Platform

05/2026 – 09/2026

CareBridge — Maternal & Early Childhood Healthcare Platform (MECHP)

Role: Fullstack & AI Integration Developer | Grade: Capstone Project (FPT University)

GitHub Repo

An enterprise-grade, omnichannel healthcare platform designed in strict accordance with WHO and Vietnam Ministry of Health (MOH) guidelines. Bridges families, certified medical experts, and an automated AI clinical triage engine through 88 production use cases across 9 domains.

Java 21 Spring Boot 3.5 Spring Security + RS256 Python FastAPI Gemini API RAG pgvector Flutter (Dart) React (TypeScript) TrackAsia Maps API GPS Geolocation WebRTC Cloudflare R2 Docker

                  RAG & AI Triage
                  Multi-channel Chat & AI Nurse
                

Engineered 24/7 AI Nurse assistant powered by RAG with Google Gemini API, n-gram hybrid search, and pgvector. Analyzes natural language symptoms against verified clinical knowledge bases, screens vitals, and automatically triggers GPS emergency alerts.

                  GIS & Emergency Routing
                  Emergency SOS & Nearest Hospital Locator
                

Integrated TrackAsia Maps API and device GPS geolocation for spatial proximity queries locating accredited maternal & pediatric facilities. Enables 1-tap SOS emergency triggers, turn-by-turn routing navigation, and real-time coordinate broadcasts to family care circles.

                  IoT & Mobile Sensors
                  IMU Fall Detection & Safety Monitoring
                

Built a real-time maternal fall detection module leveraging mobile accelerometer and gyroscope sensor data with dynamic threshold filtering and an automated 30-second emergency dispatch countdown to family care groups.

                  WebRTC & Cloud Media
                  Medical Teleconsultation & Lifecycle
                

Integrated high-definition 1-on-1 audio/video teleconsultations via WebRTC (ZegoCloud), with automated background session recording, lifecycle events, and cloud storage streaming via Cloudflare R2 and Cloudinary.

                  NLP & Semantic Safety
                  Community & AI Content Moderation
                

Architected a peer & verified-expert Q&A forum with stage-based filtering; integrated AI automated moderation pipelines using semantic NLP analysis to detect and filter harmful content, harassment, and unvetted medical misinformation.

                  Modular Architecture
                  Enterprise Monolith & RS256 Security
                

Enforced strict Modular Monolith domain boundaries with RS256 asymmetric JWT signing (SPKI public key rotation ring), Flyway schema migration pipelines, and full audit logging across 88 reachable use cases.

Multi-Role Healthcare Ecosystem

CareBridge Omnichannel UI & Clinical Workflows

Interactive preview of production interfaces across Mother, Family Care Circles, Healthcare Experts (Doctor Mobile & Clinical Web Portal), Baby Health Hub, and Administration.

18 Verified Mockups

💡 Hover and click any card to zoom high-resolution mockup with navigation

Personal Project

05/2026 – 06/2026

HeyKid — Language Intervention & Learning Platform for Children

Role: Fullstack Developer | Repository: github.com/huynd4104/project-ha

GitHub Repo

A specialized cross-platform web and mobile ecosystem designed to support speech language intervention and cognitive developmental paths for children with speech delays and special needs.

Java 17 Spring Boot 3.5 Flutter (Dart) React (TypeScript) PostgreSQL (Supabase) Cloudflare R2 (S3 SDK) Docker GitHub Actions On-Device STT/TTS

                  Monorepo Architecture
                  3-Module Monolith & Security
                

Constructed a modular 3-module monorepo with Spring Boot 3.5 REST endpoints, JWT access/refresh token rotation, and strict RBAC authorization protecting multi-tenant therapy center records.

                  Interactive Speech AI
                  Conversational Mascot & Speech Practice
                

Engineered an empathetic two-way vocal interaction pipeline pairing children with custom mascot companions utilizing on-device STT/TTS for low-latency, psychologically secure speech therapy sessions.

                  Curriculum Builder
                  Admin Therapy Portal
                

Built a responsive React web portal featuring a hierarchical Curriculum Builder: Programs → Learning Paths → Path Items → Lessons → Interactive Activities (Flashcard, Math, Speech drills).

                  Optimization & CI/CD
                  Presigned Media URLs & Pipeline
                

Eliminated backend bandwidth consumption by orchestrating AWS S3 SDK Presigned Upload URLs directly to Cloudflare R2. Deployed backend on Render and automated Flutter Web CI/CD to Vercel via GitHub Actions.

System Design

CareBridge System Architecture Blueprint

Production-ready design balancing enterprise boundaries, edge ingress, AI vector pipelines, and real-time clients.

🔍 Click to Zoom High-Resolution System Architecture Blueprint

Edge & Ingress Layer

Cloudflare Tunnel / Nginx edge gateway handling SSL termination, reverse proxying, and secure API routing to internal backend instances without exposing open server ports.

Modular Monolith Core (:8080)

Java 21 & Spring Boot 3.5 executing 88 business use cases across 9 isolated domains, secured by RS256 JWT key ring rotation, Spring Data JPA, and Flyway versioned migrations.

AI Nurse & Triage Service (:8001)

Python FastAPI microservice executing LangChain RAG workflows over Google Gemini 1.5/2.0 and pgvector similarity search, delivering clinical recommendations with medical disclaimers.

Exercise ML Sidecar (:8002)

Python MediaPipe service performing real-time maternal posture landmark extraction, skeletal angle validation, and pregnancy exercise safety verification.

Background

Experience & Education

Hands-on industrial internship combined with rigorous academic training at FPT University.

Work Experience

FPT Software Academy

Java Backend / Software Engineering Intern

05/2025 – 08/2025

Underwent intensive enterprise software engineering training focused on Java Spring Boot ecosystem, relational database modeling, and team-based agile workflows.

Developed modular backend RESTful APIs using Spring Boot, JPA/Hibernate, and SQL databases.
Practiced enterprise design patterns, transaction management, and robust exception-handling strategies.
Applied automated CI/CD practices and Git Flow collaboration standards for sprint-based team deliveries.

Academic Degree

FPT University, Hanoi

Bachelor of Science in Software Engineering

2022 – 2026

Core coursework: Object-Oriented Analysis & Design (OOAD), Data Structures & Algorithms, Database Systems, Computer Networks, Operating Systems, Software Architecture, Enterprise Application Development.

🎓

Academic & Capstone Supervisor Reference