Projects

Software I built and run every day

Six projects, all in production. For each one: the problem, what I built, and the results I can back with logs. Most of them now power products at DatPilot.

Web data crawler and API

Architecture, backend, operations

Production

The problem

My websites needed fresh product data every day, and a paid scraping API was getting expensive while telling me little about why requests failed.

What I built

Vendor-compatible request and response format, so switching was a URL change
Per-route pacing, cooldowns, retries, and a total time budget below the CDN timeout
Content-based block detection, since some block pages return HTTP 200
Pass-rate tracking per route and page type, and merging of duplicate in-flight requests

DatPilot Portal

Product, full-stack, design

Live

The problem

Small Vietnamese businesses run WordPress sites with real problems, slow pages, outdated plugins, missing legal pages, and no easy way to see them or get them fixed at a fair price.

What I built

Accounts, prepaid wallet, orders, licenses, and an admin back office
A free inspector with 51 checks in 4 groups and an A to F grade
Lighthouse runs, mobile screenshots, filmstrip, and print-ready PDF reports
Auto-generated share images for every page and report
The DatPilot Data API with prepaid packages and automatic refunds for failed requests

AffShelf theme and plugin

WordPress development

In production

The problem

A commercial plugin license capped me at 10 sites, and I only used a small slice of its features.

What I built

Data-compatible plugin: same product table and shortcodes, written from scratch
WP-CLI commands for add, fetch, refresh, list, settings, and import
Parent theme plus child starter with FAQ schema, breadcrumbs, and a guides hub
A one-command site setup script

Content operations pipeline

Automation, QA

Internal

The problem

Running 8 niche websites alone is impossible if every article and every check is manual.

What I built

Keyword plans per site, with thin topics skipped automatically
Product selection by code with explicit thresholds
Model drafting from research files only, then a review pass
A 17-point audit on the live HTML of every article, every night
A Telegram bot that reports three times a day and alerts only on real incidents

Automated tech news digest

Automation, media

Live

The problem

A brand page needs consistent, fast, accurate content, and producing a narrated video twice a day by hand is not realistic for one person.

What I built

Collection from 22 sources, with an AI editor and a source cross-check pass
Market numbers and sentences generated by code, not by the model
HTML and CSS scenes captured frame by frame in headless Chrome
Local Vietnamese text-to-speech with a cloud fallback, and karaoke captions
ffmpeg assembly with transitions and generated sound effects

Self-hosted infrastructure

DevOps

Production

The problem

Many small sites and apps need to be cheap to run, isolated from each other, and safe, without a full-time ops person.

What I built

Four containers per WordPress site: nginx, PHP-FPM, MariaDB, and Redis
A single reverse proxy as the only public entry point
Memory, CPU, and privilege limits on every container
Nightly checks for new admins, PHP in uploads, exposed endpoints, and expiring certificates

Want something like this built?

Data pipelines, WordPress products, or automation with AI agents. Tell me what you need.

[email protected]About me