danqha0

Quick navigation

system://navigate

ESC
↑↓ Navigate ↵ Open
 Resume
Full-stack developer · Hanoi, Vietnam 21.0285° N / 105.8542° E

Dang Hao I build reliable products where web, blockchain and automation meet.

I take software from an ambiguous requirement to a maintainable release—working across interfaces, services, data, and emerging technology when the product calls for it.

View experience View resume Email me
01 / Status

Open to thoughtful teams, technical collaborations, and product work with real ownership.

02 / Now

Full-stack Developer · Zinza Technology

03 / Base

Hanoi, Vietnam

01

Expertise

Useful breadth, grounded in delivery.

My work spans the product surface and the systems behind it. I focus on clear decisions, operational reliability, and code another engineer can continue.

01

Product engineering

Responsive interfaces and maintainable application flows, connected cleanly to the services behind them.

Next.js · React · Svelte · TypeScript
02

Backend & data

Service design, data modeling, and production maintenance with a bias toward understandable systems.

Node.js · NestJS · PostgreSQL · MongoDB
03

Blockchain integration

Smart-contract integration and on-chain flows treated as part of the product—not an isolated demo.

Solidity · Web3 · Rust
04

Automation & AI

Operational automation across web and Android, plus prompt work, model evaluation, and feedback loops.

Python · Android · AI evaluation
02

Experience

A practical path through product engineering.

Professional work across full-stack applications, game development, and workflow automation—from implementation through production support.

01

Full-stack Developer

Zinza Technology / Full-time

  • Develop and maintain web applications with Node.js and Next.js.
  • Design PostgreSQL and MongoDB data models and improve retrieval paths.
  • Integrate smart contracts and manage application-level on-chain interactions.
  • Evaluate AI models, design prompts, and contribute feedback loops that improve output quality.
Next.jsNode.jsPostgreSQLMongoDBWeb3AI
02

Unity 2D Developer

HN Technology / Part-time

  • Built 2D game features with Unity and C#.
  • Translated design concepts into responsive gameplay systems and iterated with the team.
UnityC#Game systems
03

Software Developer

SellAccount / Part-time

  • Built automation solutions spanning Android and web workflows.
  • Researched Android platform behavior to improve automation reliability and maintainability.
  • Maintained internal web applications and supported production operations and customers.
AndroidWeb automationOperations
03

Selected work

The engineering scope behind the job titles.

Public case studies are being prepared. These summaries describe verified areas of work without exposing client or company details.

01
Application engineering

Production web systems

End-to-end web application work covering interfaces, service logic, data modeling, maintenance, and production support.

Case study in preparation
Next.jsNode.jsPostgreSQL
02
Product integration

Blockchain delivery

Connecting smart contracts and on-chain interactions to understandable application workflows and operational requirements.

Case study in preparation
SolidityWeb3Smart contracts
03
Internal tooling

Workflow automation

Automation across Android and web environments, shaped around reliability and the workflows people use every day.

Case study in preparation
AndroidPythonWeb

Project names, live demos, architecture notes, and measurable outcomes can be added here when they are ready for publication.

04

About

Curious by default, disciplined in execution.

I graduated from the Academy of Cryptography Techniques with an engineering background in information technology. That systems foundation now informs how I build web products: understand the boundary conditions, keep the interface clear, and leave the implementation easier to operate than I found it.

Education

Academy of Cryptography Techniques

Engineer’s degree · Information Technology

2019 — 2024

Working principles

  1. 01Clarity before complexity
  2. 02Ship in maintainable increments
  3. 03Measure before optimizing

Contact

Have a useful problem to solve?

For roles, collaborations, or a technical conversation, email is the most direct way to reach me.

Start a conversation

Dang Hao / danqha0

Full-stack Developer · Hanoi, Vietnam