I'm Hoang Long (Henry), — a

Just a backend developer, pursuing a Master of Science in Machine Learning & Artificial Intelligence... Pray it works.

Based in

Ho Chi Minh City, Vietnam

HENVRIER
HANG
“
Programs must be written for people to read, and only incidentally for machines to execute.
— Harold Abelson & Gerald Jay Sussman
LONG

Every day, thousands of lines of code get written. Most of them work. Few of them matter. No, writing more code doesn’t make a better product. Neither does adding another framework, another library, another feature. Too much software is built just to be built. Overcomplicated. Overengineered. Forgettable. I’m here to build differently. To turn ideas into products. To make complex systems feel simple. To build across the stack. To explore what AI can do beyond the hype. Fast. Reliable. Thoughtful. From frontend to backend. From code to intelligence. Anything but ordinary.

I build the systems
behind scalable software.

DesignBackend

FrontendDevOps

AI Workflow

Hoang Long is a software engineer based in Ho Chi Minh City.

Ngo Duy Hoang Long

Software Engineer

Where I've worked,
and what I learned along the way.

01020304/ 04

0105/2025 — PresentHo Chi Minh

DONUTS CO.LTD

Full Stack Developer / Team Lead

Led a 3-person team building Vietnam's payroll tax declaration system for enterprises with 1,500+ employees.

Ruby on Rails · Next.js · AWS

0211/2024 — PresentHa Noi · Freelance

SUPERMETRIC

Remote Outsourcing @ Bach Tuong Phat

An e-commerce analytics platform pulling sales data from Shopee & TikTok, with Python pipelines that train AI models.

ASP.NET · Python · Azure

0312/2023 — 04/2025Ho Chi Minh

BEEHEXA CORP

Full Stack Developer

Built the social-graph backend (C# + Neo4j) and real-time chat (SignalR) for a social platform.

C# · Neo4j · RabbitMQ

04Personal ProjectSolo build

CINEMATE

Sync playback over WebRTC

Synchronized video watching for remote teams — under 50ms playback drift over WebRTC.

Java · WebRTC · QUIC

Featured work,
worth a closer look.

CineMate

A real-time video watching application with synchronized playback for remote teams, allowing users to watch content together from multiple sources with integrated chat and video conferencing capabilities.

ASP.NET Core / SignalR / WebRTC

NoteWorth

A full-stack note management application with advanced collaboration features, allowing users to create, share, and collaboratively edit notes in real-time with markdown support.

Next.js / TypeScript / Node.js

View all projects →