Po-Hsu Chen

Full-Stack & AI Engineer (UX)

I build AI-powered full-stack applications, from the models and APIs through to the interfaces people use.

Melbourne, Australia

youtube.com/@pohsuchenwork

linkedin.com/in/pohsuchenwork

pohsuchenwork@gmail.com

Resume (PDF or DOCX)

Skills

Languages

Python, C, C#, C++, Java, JavaScript, TypeScript, Kotlin, Swift, Dart, Rust, Go, SQL, GraphQL, Bash, PowerShell, x86, ARM, Web Assembly (WASM), HTML, CSS, JSON, YAML, XML, KQL

Frontend

React.js, Next.js, Astro, Vite, Tailwind CSS, Three.js, WebGL, OpenGL

Desktop

Electron, Tauri, Flutter Desktop

Mobile

React Native, Expo, Flutter

Backend

Node.js, Express.js, Django, REST (API), FastAPI, WebSockets, Socket.io, Stripe

Databases

PostgreSQL, MySQL, SQLite, MongoDB, Redis, Supabase, Firebase

DevOps

Git, GitHub, Docker, Kubernetes, Linux, Virtualization, AWS, Azure, GCP, GitHub Actions, CI/CD, Vercel, Netlify, Nginx (Reverse Proxy), Terraform, Bicep

Security

OWASP, OAuth, TLS/SSL, encryption, penetration testing

Testing

Vitest, Jest, Playwright, Cypress, pytest, axe-core, Lighthouse CI

LLM APIs (OpenAI, Claude, Gemini), MCP, Ollama, Retrieval Augmented Generation (RAG), vector search, agents, HuggingFace, PyTorch, TensorFlow, MediaPipe, NumPy, pandas, scikit-learn, artificial intelligence, machine learning, deep learning, computer vision, prompt engineering

UX & Design

Figma, design systems, WCAG/a11y, UI design, wireframing, prototyping, user testing, SEO

Hardware

PC building, component selection, CPU/GPU/RAM architecture, storage & I/O fundamentals, Arduino, Raspberry Pi, Microcontrollers, Microcomputers, Verilog, SystemVerilog, VHDL

Game & Simulation

Unity, Unreal Engine, Godot

Project Management

Agile, Scrum, project planning, sprint planning, backlog refinement, stakeholder communication, cross-functional collaboration

Communication

Clear cross-team communication, Comfortable with founders & engineers, Comfortable with investors & customers

Main Projects

Vaporly

Static Landing & Download Site · July 19, 2026

Vaporly Website is a single-file, static landing page that auto-detects your OS and gives you the right one of five installers.

Single-file, zero-dependency HTML/CSS landing page with a tokenized design system and automatic dark and light theming
An OS-aware download hub detects the visitor's platform in vanilla JS and links the right of five GitHub-Release installers
Inline SVG icon sprite, self-hosted variable font, and fluid responsive type, auto-deployed to GitHub Pages via a GitHub Actions workflow

pohsuchenwork.github.io/vaporly

Screenshot of the Vaporly GitHub repository README, describing the on-device dictation app

Vaporly Code

Private On-Device Dictation App · July 19, 2026

Vaporly turns hold-to-talk speech into clean, app-aware text, all recognized and tidied on-device so nothing leaves your computer.

Cross-platform desktop app built in Rust and Tauri v2 with a React, TypeScript, and Tailwind UI, on macOS, Windows, and Linux
Transcribes fully on-device with a local Parakeet speech model and Silero voice-detection powering a quiet whisper mode
Tidies speech with a local Qwen2.5 model (llama.cpp), stripping filler and fixing self-corrections; no cloud and no telemetry

github.com/pohsuchenwork/vaporly

Side Projects

Screenshot of the public claude-system GitHub repository page, showing the repo description and file list

Claude Code System

Deterministic Safety Scaffold for AI Agents · June 14, 2026

Claude Code System wraps a probabilistic coding agent in deterministic scaffolding and approval gates that stop silent mistakes.

Drives Claude Code through 12 least-privilege commands, each with propose-then-approve plan-mode gates before any code changes
Splits memory by rate of change across CLAUDE.md (rules), DYNAMIC.md (current state), and Git (history) to keep context lean
Hardened against 12 stress-tested failure modes (silent edits, context rot, runaway sub-agents), each with a built-in mitigation

github.com/pohsuchenwork/claude-system

Sugoso Pro Signup

Zero-Dependency Waitlist Landing Page · June 12, 2026

Sugoso Pro Signup is a dependency-free waitlist page with a locked-down Supabase backend that keeps the email list unreadable.

Static site with no framework, build step, bundler, or third-party JavaScript, around 40KB of HTML, CSS, and JS
Insert-only Supabase RLS with no SELECT, plus treating 201 and 409 alike, so the signup list can't be read or enumerated
Blocks disposable emails on both the client and a database trigger, with a honeypot field and no analytics, trackers, or cookies

sugoso-pro-signup.vercel.app

Sugoso

Native macOS Menu-Bar Focus Timer · June 11, 2026

Sugoso keeps a calm focus timer in your Mac's menu bar and nowhere else, with no backend and nothing that leaves your device.

Keeps time by the wall clock, recomputing what's left from the session's end moment, so it never drifts across sleep and wake
Runs menu-bar-only with no Dock icon, hand-drawing its glyph-and-time label into an image to bypass MenuBarExtra's forced font
Ships with no backend or network calls; durations, toggles, and tasks live on-device in UserDefaults, open source (Apache 2.0)

github.com/pohsuchenwork/sugoso Watch demo

HoloTable

In-Browser Hand-Tracked AR Hologram · June 10, 2026

HoloTable floats a 3D hologram above your bare palm from just a webcam, with hand-tracking on-device so nothing ever uploads.

Tracks 21 3D hand landmarks per webcam frame with MediaPipe Hand Landmarker (WebAssembly), on-device so frames never upload
Floats a 3D object along the palm's normal and smooths it to sit steady on your real fingers, all rendered in Three.js
Runs with no backend; the camera never leaves the browser, behind a strict CSP that pins capture and blocks iframing

holotableapp.vercel.app Watch demo

CLImon

Full-Stack Terminal Pokémon Battler · June 7, 2026

CLImon brings cheat-proof Pokémon battles to the terminal, drawing sprites as ANSI art and arbitrating every move on an authoritative server.

Draws each Pokémon as a prebuilt ANSI half-block mosaic (two 24-bit pixels per cell via chafa), so visuals need no network
A pure, seed-driven battle engine produces identical fights offline and on the server, testable down to the last hit point
An authoritative server owns the state, randomness, and rules and validates every move, so cheating is impossible by design

github.com/pohsuchenwork/climon Watch demo

Rock Paper Vision

Full-Stack Multiplayer Vision Game · June 5, 2026

Rock Paper Vision replaces button-click online rock paper scissors with real webcam hand throws, synced fairly across latency.

Reads rock/paper/scissors from your webcam using MediaPipe's 21 3D hand landmarks and finger-extension ratios
Online stays fair across latency: the host broadcasts a future timestamp and ping/pong clock-sync lands the countdown together
Solo, two players on one webcam, or online over peer-to-peer WebRTC; video never touches a server

multihand-rps.vercel.app Watch demo

Magister

Full-Stack AI Code Professor · May 31, 2026

Magister tackles the 2am coding wall, turning any pasted snippet into a clear, lecturer-style explanation.

Paste any code and it streams a plain-language, lecturer-style walkthrough with key concepts and common traps
Built and deployed end-to-end on Vercel, running an open-weights Llama model with no warm server and ~1s answers
Per-IP and global rate limits backed by Redis, a 24-hour response cache, and HMAC-hashed visitor IPs

magisterapp.vercel.app Watch demo

Scanr

Full-Stack Nutrition Scanner (PWA) · May 30, 2026

Scanr turns dense food labels into an instant, on-device nutrition breakdown and health score from one barcode scan.

On-device barcode scanning (EAN-13/UPC-A/EAN-8) via the browser's native detector, with a WASM fallback
No account, cookies, or tracking; camera frames stay on-device and scan history lives only in IndexedDB
Each scan scored locally into a 100-point health gauge from Open Food Facts (Nutri-Score, NOVA, Eco-Score)

scanrapp.vercel.app Watch demo

Coffee Catalogue

Full-Stack Storefront & Admin CMS · May 29, 2026

Coffee Catalogue gives a storefront a secure, triple-gated admin console so non-technical staff can manage the catalogue safely.

Browsable coffee storefront with live search, roast filters, sorting, and pagination, server-rendered on Next.js 16
Secured admin console behind three independent gates: edge middleware, a server-side check, and Supabase row-level security
Nonce-based CSP, constant-time login throttling, a Postgres row ceiling enforced in-database, and a ~90-check pentest suite

coffeecatalogue.vercel.app Watch demo

Quickdraw

Full-Stack Computer Vision · May 26, 2026

Quickdraw makes your bare hand the controller, using webcam hand-tracking to fire the instant your fist opens.

Browser-based Wild West duel where you open your fist on webcam to shoot
MediaPipe HandLandmarker tracks 21 hand landmarks per frame at 30fps, all client-side with no upload
Custom open-fist classifier with edge-detection so the shot fires once when your fist opens, not every frame

quickdrawcv.vercel.app Watch demo

Full-Stack Portfolio

Frontend Accessibility & UX/UI · May 25, 2026

Full-Stack Portfolio proves frontend craft by being the demo itself: per-pixel responsive, WCAG AA, and strict-CSP.

Static Astro 5 site, per-pixel fluid via calc() expressions with no media-query breakpoints
WCAG 2.2 AA verified via axe-core in CI on mobile, tablet, and desktop in both themes
Strict CSP with no unsafe-inline and zero client-side storage: no cookies, localStorage, or sessionStorage

pohsufullstack.vercel.app Watch demo

DealsForYou

Full-Stack Reddit Scraper · May 20, 2026

DealsForYou pulls the best PC-parts deals scattered across Reddit into one fast, filterable page, no account needed.

Hourly Reddit scraper surfaces the best PC parts deals on one fast, filterable page with no account required
Bookmark feature with zero server state: saved deals live only in the user's own browser storage
All database queries use bound parameters; security audit and pentest conducted during the build

justdealsforyou.vercel.app Watch demo

MyMagicPaper

Full-Stack AI Vision · May 19, 2026

MyMagicPaper makes the handwriting-personality gimmick real, with a vision AI that reads your canvas strokes and replies.

Built a handwriting personality analyser in 14 hours: users draw on a canvas, a vision AI reads their strokes, and returns a short personality reading
Rate limiting via Upstash Redis with salted SHA-256 hashed IPs, 24h TTL, per-IP burst limit, and global circuit breaker. No raw IPs ever stored

mymagicpaper.vercel.app Watch demo

Blackjack Ultra

Full-Stack Security & Bug Bounty · May 13, 2026

Blackjack Ultra backs up its security claims by shipping a real blackjack app and opening a public bug bounty.

Built a full-stack blackjack web app (frontend, backend, database, email auth)
Conducted 2 hours of penetration testing and documented all vulnerabilities
Launched a public $20 bug bounty challenge to crowdsource security testing from the developer community

blackjack-ultra.vercel.app Watch demo

Solary

Frontend 3D · May 12, 2026

Solary makes orbital mechanics tangible with a real-time 3D solar system on Keplerian physics, not faked keyframes.

Real-time 3D solar system in the browser built with Three.js in 5 hours
Planets run on Keplerian orbital mechanics calculated from real astronomical constants, elliptical orbits not circular approximations or hardcoded keyframes

solary-app.vercel.app Watch demo

Personal Portfolio

Frontend Animations · May 4, 2026

Personal Portfolio shows frontend and motion craft in action rather than describing it, built in two days for $10.

Studio-grade personal site built in 2 days for $10
Built as a direct demonstration of polished frontend and motion work, the animations are the main point

pohsuchenwork.vercel.app Watch demo

Savepoint Signup

Full-Stack Signup Page · May 1, 2026

Savepoint Signup demonstrates a real signup flow that persists users in a backend, not just a polished form.

Allows users to signup with databases in the backend
Product demonstration in the frontend

savepoint-signup.vercel.app

Certifications

UX Design

Google · 2025

Seven-course professional cert on user research, wireframing, prototyping in Figma, usability testing, and accessibility. Connects the technical build to the user experience it actually serves.

Project Management

Google · 2025

Six-course professional cert on Agile, Scrum, scoping, stakeholder management, and risk. Shipping full-stack means managing scope and timelines, not just writing code, and that is the other half of the job.

CS50 Introduction to Computer Science

Harvard · 2024

Harvard's flagship CS intro, taught in C and covering memory, pointers, algorithms, data structures, and web. The substrate under every framework, and knowing what is actually happening keeps you out of expensive mistakes at the higher layers.