Hoàng Thái · Senior Frontend Engineer

Real products, real users,
built end to end.

I own the full product lifecycle — business analysis, Figma, architecture, code, deployment and monitoring. Below are two of them: a multi-tenant SaaS an enterprise customer runs its business on every day, and an IoT signal system used at national sports tournaments.

2 products in production ~40 staff daily users 2,900+ events managed National tournaments

Explore EventHub See the hardware

Product 01 · SaaS platform

EventHub

In production quanlytiec.vn Live admin App Store

Product Owner & Full-stack Engineer · solo, from business analysis to production monitoring

A multi-tenant management platform for wedding & event centers — bookings, orders, kitchen planning, payments and staff operations in one place. The first customer, Thang Long Co. (Hai Duong), runs it daily with ~40 staff accounts on an annual subscription contract with official invoicing.

enterprise tenant in production

~40

staff accounts in daily use

2,900+

events booked & managed

Annual

subscription contract, invoiced

quanlytiec.vn

Ships with a Flutter companion app

Managers approve, monitor and chat on the go — same realtime data as the web app.

Download on the App Store

EventHub mobile event schedule — Schedule

EventHub mobile order details — Order details

EventHub mobile internal chat — Team chat

EventHub mobile notifications — Notifications

EventHub mobile activity feed — Activities

EventHub mobile user management — User management

One platform, the whole operation

Booking & scheduling

Halls, sessions and time slots, conflict-aware

Orders & menus

Dishes, services, quantities and pricing

Checklists

Per-event operations lists for staff

Payments & deposits

Receipts, partial payments, settlement

Receivables

Debt tracking with alerts per event

Dish recipes

Standard recipes behind every menu item

Ingredient planning

Quantities computed from booked orders

Inventory

Stock in/out, suppliers, import receipts

Internal chat

Realtime team messaging, per-event threads

Role-based permissions

Fine-grained access per module and action

Device-level security

Trusted-device binding per account

SMS OTP

Phone verification for sensitive actions

Stack & ownership

React TypeScript Tailwind CSS shadcn/ui + Radix Quill editor Node.js MySQL Redis Firebase Flutter Electron Docker Traefik Nginx Cloudflare AWS S3

Product 02 · IoT + Realtime

Referee Signal-Light System

National tournaments

Product Owner & Full-stack/IoT Engineer · hardware, firmware and web, designed and built from scratch

A referee decision system used at national weightlifting championships: a custom signal-light column wired to three referee button stations, driven by ESP32 firmware and a web admin. Every decision syncs through Firebase Realtime Database and lights, buzzer and arena scoreboards react in under a second.

3 referee stations

Wired push-button units, one per referee

ESP32 controller

Custom firmware, drives lights & buzzer

Firebase RTDB

Sub-second realtime synchronization

Arena outputs

Lights, sound and scoreboard displays