Senior Frontend / Fullstack Developer · Founder at TespDev

Hi, I'm Hồng Hải
Frontend-focused Fullstack Developer

Based in Vietnam 🇻🇳

6+ years building modern web applications, enterprise systems, e-commerce platforms, and digital products. Main expertise in ReactJS, VueJS, TypeScript — with hands-on NodeJS for backend and system integration.

Hồng Hải

About Me

I'm a developer who cares about both engineering quality and user experience. Beyond writing code, I enjoy turning complex business requirements into simple, reliable, and intuitive products — from internal enterprise systems to products used by real customers.

I have experience working independently as well as leading frontend teams, collaborating closely with designers, backend developers, product owners, and business stakeholders.

I also founded TespDev, an independent technology studio focused on building digital products and event technology for businesses. Currently, I work as a Software Engineer at Phuong Dong General Hospital, while continuing to develop TespDev and work with selected partners and clients.

Products I've worked across

  • Enterprise management systems
  • Healthcare applications
  • E-commerce platforms
  • Booking systems
  • Learning management systems
  • Event technology
  • Business management software
  • Mobile applications
  • Digital transformation projects

Experience in Numbers

6+
Years of Software Development
20+
Projects Completed
3–5
Developers Led in Frontend Teams
2+
Years of NodeJS Experience
2,000–5,000+
Typical Event Scale via TespDev

Experience

Roles, studio work, and selected clients & partners

Software Engineer — Phuong Dong General Hospital

2026 — Present

Working on healthcare and internal enterprise applications used to support hospital operations and business processes.

  • Developing and maintaining enterprise web applications
  • Building reusable UI components and frontend architecture
  • Integrating REST APIs and business workflows
  • Working with complex forms and healthcare-related data
  • Optimizing application performance and user experience
  • Collaborating with backend developers, designers and business teams
  • Maintaining and improving existing systems

Founder — TespDev

Technology Studio · Event Tech · Digital Products

I founded TespDev as an independent technology studio focused on building practical digital products and technology experiences for businesses.

tespdev.com
  • Event technology
  • Custom web applications
  • Business management systems
  • Digital transformation
  • Internal enterprise applications
  • Custom software development
  • QR-based event platform: check-in, stamp collection, gift redemption, and activity tracking for large-scale events

Selected Clients & Partners

SAPECO

Digital Transformation & Business Management Platform

Partnering with SAPECO, a pest control and disinfection service provider, to develop and maintain digital systems supporting day-to-day business operations.

  • Staff management
  • Administrative management
  • Service management
  • Reporting systems
  • Customer and business data
  • Internal workflows
  • Payment and QR banking workflows
  • Multi-branch management

Technology

ReactJSTypeScriptNodeJSMySQLRedisREST API

MieNailRoom

Nail Salon Management Platform

Working with MieNailRoom to develop a mobile-first management platform for nail salon businesses, designed specifically around salon workflows.

  • Customer management
  • Service management
  • Staff management
  • Orders and invoices
  • Revenue management
  • Branch management
  • Payment workflows
  • QR banking payment
  • Operational reporting

Technology

ReactJSTypeScriptNodeJSMySQLTailwind CSS

What I Do

Practical digital products and systems built around real business workflows

Web Application Development

I build modern, responsive and scalable web applications using ReactJS, VueJS and TypeScript.

Enterprise Systems

I develop internal systems that simplify complex business workflows and help organizations manage their daily operations.

Event Technology

Through TespDev, I build technology platforms for events, including QR check-in, customer engagement, digital stamps, gift redemption and event data management.

Business Management Systems

I develop custom management platforms tailored to specific industries and operational workflows.

Fullstack Development

With experience in both frontend and NodeJS backend development, I can work across the application stack — from user interfaces and business logic to APIs, databases and deployment.

Technical Skills

Frontend-first, with solid backend, database and infrastructure experience

Frontend

ReactJS
ReactJS
VueJS
VueJS
Next.js
Next.js
TypeScript
TypeScript
JavaScript
JavaScript
HTML5
HTML5
CSS3
CSS3
Tailwind CSS
Tailwind CSS

State & Data

Redux
Redux
Zustand
Zustand
Vuex
Vuex
TanStack Query
TanStack Query

Forms & UI

React Hook Form
React Hook Form
FullCalendar
FullCalendar
Flatpickr
Flatpickr
BlueprintJS
BlueprintJS
HeroUI
HeroUI

Backend

2+ years of hands-on NodeJS experience, mainly focused on building APIs, business logic and supporting services.

NodeJS
NodeJS
ExpressJS
ExpressJS
REST API
REST API
JWT Authentication
JWT Authentication

Database

MySQL
MySQL
PostgreSQL
PostgreSQL
MongoDB
MongoDB
Redis
Redis

DevOps & Infrastructure

Experience deploying, maintaining and optimizing production applications — server config, reverse proxy, SSL, process management, storage and monitoring.

Ubuntu
Ubuntu
Nginx
Nginx
PM2
PM2
Cloudflare
Cloudflare
Cloudflare R2
Cloudflare R2
SSL / TLS
SSL / TLS
DNS
DNS
GitHub
GitHub

Other Tools

Git
Git
Figma
Figma
Photoshop
Photoshop
Canva
Canva
CapCut
CapCut

Collaborations

Trusted Partners

Selected brands and organizations that have trusted me to deliver digital products, enterprise systems, and event technology.

  • Viettel
  • VPBank
  • HABECO
  • APECO
  • OVERMORE
  • Hanoi Premium
  • ST Communications
  • mie.nailsroom

Featured Projects

Selected products and platforms I've worked on

  • CareTech

    Hospital Management System

    Hospital operations and internal workflows.

    ReactTypeScriptTailwind CSSReact QueryReact Hook Form

  • WinMart

    E-commerce Platform

    E-commerce website for WinMart.

    ReactTypeScript

  • True Hope Hospital

    Hospital Management System

    Web hospital management for healthcare operations.

    ReactTypeScript

  • Vinpearl Booking

    Travel & Booking Platform

    Booking for tours, flights and hotels.

    ReactTypeScript

  • T99 LMS

    Learning Management & Business System

    Users, customers, assets and warehouse management.

    ReactTypeScript

  • 業務支援ツール

    Business Support Platform

    Internal user management and registration.

    ReactTypeScript

  • Adiary

    Baby's Diary

    Track feeding, lactation, weight and sleep.

    VueJSPiniaTailwind CSSVue Router

  • Podland

    E-commerce Website

    E-commerce site for an international business.

    WordPressElementorWooCommerce

  • Marinbikes

    E-commerce Platform

    Custom WooCommerce store.

    WordPressElementorWooCommerceACF

My Approach

How I think about building software that lasts

01

Build for real users

I focus on understanding how people actually use a product rather than simply implementing requirements.

02

Keep things simple

Complex business logic should result in a simple user experience.

03

Think beyond the frontend

Good frontend development requires understanding APIs, databases, business logic, infrastructure and the product itself.

04

Build for long-term use

I prioritize maintainable architecture, reusable components, performance and stability — especially for systems used continuously by businesses.

Let's Build Something

Have a product idea, a business workflow that needs to be digitized, or an existing system that needs to be improved? I'd love to hear about it.

Contact Information

Hồng Hải

Senior Frontend / Fullstack Developer

Founder — TespDev

Location

Vietnam 🇻🇳