Skip to content

Projects

Selected engineering work

Start with the strongest backend case study, then scan the rest by stack, role, and engineering focus.

5 projects

Backend API / Personal Project / Source

H-Phsar — B2B Marketplace API

Problem

Wholesale trade between distributors and retailers still runs on phone calls and paper: orders get lost, prices stay opaque, and neither side has a record of what was agreed. H-Phsar (ផ្សារ — 'market' in Khmer) digitizes that relationship into one platform both sides can trust.

Solution

A Spring Boot marketplace API connecting distributors and retailers through catalogs, carts, controlled order transitions, and real-time notifications.

My contribution

  • Separated role-specific APIs over one shared relational model
  • Enforced every order transition through an explicit state machine

Engineering focus

Authentication · Order workflow · Data modeling · Real-time notifications

Solo Developer — Backend · 2026 — Present

  • Spring Boot 3
  • Java 17
  • MyBatis
  • PostgreSQL
  • Spring Security
H-Phsar — B2B Marketplace API — preview

All projects

Backend API

Source

AuthHub — Reusable Authentication Service

A reusable Spring Boot authentication service with JWT refresh and revocation, MFA, RBAC, audit logging, and a sample secured API.

Role · Solo Developer — Backend

Engineering focus

Authentication · Multi-factor auth · RBAC

View case study
  • Spring Boot 3
  • Java 17
  • PostgreSQL

Full-Stack Application

Live

Hengo — Focused Korean Learning Platform

A focused AI-assisted Korean learning platform for software engineers and international professionals living and working in Korea.

Role · Solo Developer

Engineering focus

Workplace Korean · Spaced repetition · AI voice coaching

View case study
  • Next.js 16
  • React 19
  • TypeScript

Full-Stack Application

Live

Luyra — Personal Finance Workspace

A personal finance workspace for money tracking, budgets, savings, analytics, and recurring financial reviews — built as the active product surface of Luyra.

Role · Solo Developer

Engineering focus

Neon data boundary · Financial workflows · Scheduled reporting

View case study
  • Next.js 16
  • React 19
  • TypeScript

Full-Stack Application

Live

VSTV Agent — Real Estate Platform & Operations Console

A public real-estate platform and private staff workspace for VSTV Agent: property discovery, agent contact, unit inventory, CSV import, and scheduled Telegram publishing for Phnom Penh rentals.

Role · Solo Developer — Full-Stack

Engineering focus

Property discovery · Operations workflows · Role-based access

View case study
  • Next.js 14
  • React 18
  • TypeScript
Let's Build Together

Have a system or service to build?

Available for Java and Spring Boot backend engineering, API architecture, and product engineering teams that value dependability.