Issue No. 001 · Backend Engineer

Xuan Hao — Backend Engineer portfolio hero, classical Greek bust illustration

QUOTE OF
THE DAY. — Backend Engineer specializing in Java, Spring Boot and AWS

“The only true wisdom is in knowing you know nothing.”
— Socrates

01 — About

The story
behind the code.

I'm a Backend Engineer based in Vietnam, currently writing Java services at FPT Software. Three years in, my obsession is the same: clean APIs, well-designed data models, and infrastructure that doesn't wake you up at 3 AM.

I work mostly in the AWS ecosystem and care a lot about DX — the kind of codebase the next engineer will actually enjoy reading. When I'm not shipping microservices, I'm tinkering with Docker, Kubernetes, and the occasional weekend Python script.

Years exp.

Major projects

∞

Coffees brewed

02 — Experience

2022 — Present

FPT Software

Java Developer · AWS Engineer

Three years designing and shipping Java backend services for enterprise clients across Japan. Owned everything from API design and data modeling to AWS deployments and on-call rotations.

Selected Projects

P-01FamilyMart Japan

FMJFA

Senior Backend Engineer·2024 — Present

Asset management platform overseeing thousands of convenience stores, buildings, machinery and equipment across FamilyMart's nationwide footprint in Japan.

My Contributions

▸Built business logic in Java / Spring Boot serving daily store operations
▸Designed AWS Glue + Python ETL pipelines for asset data ingestion
▸Tuned heavy SQL queries and refactored data access for faster reports
▸Led code reviews, authored technical docs, drove business-flow improvements

JavaSpring BootAWS GluePythonPostgreSQL

P-02Odds Park Corp

OPNEXT88

Senior Backend Engineer·2022 — 2024

Major Japanese online betting platform for regional public sports — 地方競馬 (regional horse racing), keirin (cycling) and auto racing.

My Contributions

▸Developed Python / Lambda common functions for betting microservices
▸Deployed and operated services on AWS with monitoring and CI/CD
▸Build and deploy messaging pipelines for live betting events with ActiveMQ and Redis
▸Introduced AI-assisted automation and Docker / Podman local dev environments

JavaPythonMicroservicesAWSDockerPodman

03 — Projects

Personal
Projects.

A few personal projects I build after-hours — where I experiment with new tech and sharpen my backend skills.

PR-01

Personal Project

Portfolio Website

Personal portfolio inspired by Rolling Stone editorial style — built with TanStack Start, React 19, Tailwind v4. SSR-friendly, SEO-tuned, and a contact form wired straight to Supabase.

ReactTanStack StartTailwindSupabase

View Project Source

PR-02

Personal Project