Portfolio
Showcasing my project experience and technical achievements in frontend and backend development.
High-Performance Cryptocurrency Exchange Backend
A distributed matching system built in Go, split into gateway, order-service, matching-engine, and market-data-service, with Transactional Outbox, leader election, batch ingestion, and architecture-level load validation.
Discord-style Chat App
A Discord-style real-time chat application with servers, channels, direct messages, and a friend system, built with Vue 3 + Go. The backend now supports K3s horizontal scaling and Redis Pub/Sub for cross-pod realtime broadcast.
Muon Music Player
A cross-platform mobile music player app built with Flutter, streaming and downloading YouTube audio/video ad-free with offline playback support.
YouTube Real-Time Bilingual Subtitles
A Chrome Extension and Go WebSocket backend system that seamlessly intercepts video audio and overlays real-time bilingual subtitles leveraging Deepgram STT and a Google/DeepL API failover mechanism.
OVH Dual-Node VPS Infrastructure
A fully automated setup toolkit for a dual-node OVH VPS Kubernetes environment with K3s, Tailscale, Cloudflare Tunnel, and a complete observability stack.
Side Project Ops (GitOps Platform)
An ArgoCD App-of-Apps GitOps repository that centrally manages Kubernetes deployments for all side projects via automated CI/CD pipelines.
GCP Free Stack — Zero-Cost Self-Hosted Infrastructure
A zero-cost self-hosted infrastructure stack on GCP's free-tier e2-micro VM, using IPv6-only networking, Cloudflare Tunnel, WARP proxy, and Socat to eliminate a $3.65/month IPv4 charge while running 6 production Docker services.
LazyBacktest
A lightweight Taiwan stock market backtesting system with a React web UI, supporting 6 technical strategies, parameter optimization via grid search, and 9 performance metrics.
Algorithm Guide Website
An interactive LeetCode algorithm study guide web app with Markdown-rendered problem explanations, flashcard mode, and progress tracking across 16 algorithm categories.
Guitar Learning Website
A full-stack electric guitar learning platform with a Markdown knowledge base, interactive fretboard, D3 knowledge graph, and GitHub-style practice heatmap.
Senior Backend Engineer Interview Guide
A comprehensive, open-source senior backend engineer interview preparation knowledge base covering CS fundamentals, system design, infrastructure, and 160+ structured topic files.
YouTube Video Downloader Extension
Chrome extension supporting YouTube video downloading and AI summarization, integrated with n8n workflow automation.
Green Fragrance Handmade Soap Brand Site
A comprehensive brand platform built with Nuxt.js 3, migrated from PM2 to k3s/ArgoCD GitOps architecture, featuring Drizzle ORM, PostgreSQL, and MinIO storage.
Vue Chess Game
A web-based chess game developed with Vue 3, integrating Stockfish engine for AI battles.
YouTube Discord Bot
Discord Bot that automatically tracks YouTube channels for new videos and live streams and pushes notifications to designated channels.
PHP E-commerce Cart
A simple e-commerce system developed with PHP, including product browsing, shopping cart, user registration/login and other basic functions.
Pomodoro Productivity App
A productivity management application based on the Pomodoro Technique to help users manage tasks and focus time.