I build software people use to get work done.

I studied Information Security at HUIT. My first development work involved OCR and internal tools at MobiFone Digital Payment. I later built and deployed client websites at VNDTS, and today I work mainly on business software at SOF.

Across those roles, I've worked on different parts of the stack depending on what the project needed — UI, application logic, APIs, databases, deployment and troubleshooting.

Understand the flow first

Before changing a screen, I try to understand who uses it, what happens before and after it, and which cases usually cause problems.

Follow the feature end to end

A feature rarely stops at the UI. I often move through the frontend, application logic, API and database until the whole flow works.

Test what can actually break

I check the normal path, edge cases and production behavior instead of treating a successful build as proof that the work is finished.

Business software

Desktop and web tools for logistics, warehouse and service operations.

Web applications

Client websites and web apps, including frontend work, PHP/MySQL CMS work and production updates.

Automation

OCR, Selenium and Python utilities for repetitive or document-heavy tasks.

IoT & security

ESP32, MQTT/TLS and applied cryptography experiments for secure connected systems.