the dragon

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My name is Long.

In Vietnamese it means dragon.

Hà Nội's old name is Thăng Long — the ascending dragon.

I build where most people pick a side —

design or engineering. research or code.

I never could choose. So I do all of it, end to end.

My first product wasn't software. It was my family's restaurant —

3.8 to 4.5 stars. 1,400 reviews. That's where I learned shipping means moving a real metric.

ProspectIQ runs inside FPT — and survived the death of its data vendor.

Because I build for the failure case first. Vendors will die on you.

Target7 grades essays as close to an examiner as two examiners agree. Live, no login.

And I tell you its limits — honesty is part of the work.

Paris ⇄ Hà Nội. Trilingual. An operator looking for the next thing to build.

Let's build something.

03 — The work

What I've built.

Resilience · ML

AI prospecting, inside FPT

Rebuilt to survive its data vendor's death — multi-provider fallback, queue + retry so no single API can break the pipeline.

ML · Calibration

Essay grading, examiner-close

Grades as close to an examiner as two examiners agree. Live, no login — and it tells you its limits.

Ops · Product

My first product wasn't software

The family restaurant: 3.8 → 4.5★ across 1,400 reviews. A real metric, moved end to end.

Edge · Scraping

Paris ⇄ Hà Nội, in real time

Live flight-route scraping with a mock fallback — full live result when it works, never empty when it doesn't.

Let's build something —