Liu
Thuan.

I’m a mobile engineer at the core — Flutter is where I start, and the app is what every layer beneath it answers to. Each feature pulled me deeper: into the Laravel API, the Postgres schema, the Go service, the edge that serves it. My loop is scope · ship · sharpen — small systems, tended like gardens, that hold once real users arrive.

What I bring isn’t a single layer — it’s the architecture across all of them. On Gypsy Live I designed and shipped a six-codebase system solo: a Flutter client, a Laravel API, a Go real-time service, a Python transcoder, three Cloudflare Workers. I own the calls that matter — where state lives, where the seams fall, what each service is allowed to know.

I go deepest where users never look — a feed endpoint cut from ~250 queries to 8, response times dropped from 3–5s to under 600ms, hot video pre-warmed across 300+ edge locations. Idempotent jobs, chunked upserts, smart-TTL caches: the product feels calm because the infrastructure is tuned, not just wired up.