Hi, I'm Walter Fan

Full-stack engineer · Real-time communication practitioner · AI engineering explorer

I build software across backend services, web applications, desktop tools, media systems, and AI-assisted engineering workflows. I also write about engineering practice, Metrics Driven Development, WebRTC, design patterns, security and the craft of building reliable systems.

Engineering Focus

mindmap
  root((Walter Fan))
    Real-time Communication
      WebRTC
      Media Pipeline
      Telephony
    Engineering Practice
      Metrics Driven Development
      Agile
      Design Patterns
    AI Engineering
      Agent Harness
      Developer Tools
      Workflow Automation
    Full-stack Systems
      Backend Services
      Desktop Apps
      DevOps

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Featured Writing

Topic	Repository	Online Version
Metrics Driven Development	mdd	Read online
WebRTC Primer	webrtc_primer	Read online
Software Engineering in AI Era	walter-ai-engineering-book	Read online
Harnessing AI: The Craft of Shaping Agents	walter-ai-harness-book	Read online
Desktop Apps with Tauri + Rust	walter-rust-tauri-book	Read online
The Tao of Agile	the-tao-of-agile	-
The Security Handbook	security-handbook	-
DevOps Cookbook	devops-cookbook	-
GStreamer Cookbook	gstreamer-cookbook	-

Side Projects

Recent Work

Project	Focus	Notes
markpad	Local Markdown editor, reader, translator, and diagram renderer	Python/Poetry web tool with a file tree, split Markdown source and HTML preview, eye-friendly themes, Mermaid and PlantUML rendering, and OpenAI-compatible LLM translation.
lazy-rabbit-skills	Personal collection of reusable AI agent skills	Skill library for documentation, project knowledge bases, diagram rendering, code review, language-specific development, ops helpers, planning, and quality workflows, installable across agents such as Claude, Codex, Cursor, and opencode.
face-detection-webrtc	Face detection, landmarks, training, and recognition demo	Computer vision playground using OpenCV Haar detection, MediaPipe Face Mesh, LBPH recognition, FastAPI, Vue/Vite, and browser camera capture via WebRTC getUserMedia.

Productive Tools

Project	Focus	Notes
Lazy Todo App	Personal productivity desktop app	Todo lists, sticky notes, Pomodoro, toolbox, and virtual agents.
Lazy Form Instructor	AI-assisted form automation	Java library for smart form filling and execution.
GStreamer Pipeline Verifier	Media pipeline validation	C++ tool for validating GStreamer pipelines.
WebRTC Stats Tool	WebRTC diagnostics	Parser and analyzer for Chrome WebRTC internals dumps.
Video Codec Analyzer	Codec analysis	H.264 codec analysis tool in C++.
gtest2html	Test report conversion	Python utility that converts GoogleTest XML reports to Markdown or HTML.

AI and Media Experiments

Project	Focus	Notes
AI Dress Recommender	AI recommendation	Weather-aware dress recommendation powered by AI and LLMs.
WebRTC Transcriber	Speech transcription	WebRTC recorder that converts speech to text.
OCR Web App	OCR	Image text recognition app based on libtesseract.
video_to_text	Video text extraction	Tool for extracting text from video or image files and generating subtitle translations.

Examples and Code Katas

Project	Focus	Notes
WebRTC Snippets	WebRTC examples	WebRTC-related snippets and experiments.
WebRTC Video Chat	Real-time video	WebRTC video chat example.
WebRTC Remote Sharing	Remote sharing	Remote sharing example based on WebRTC.
Code Kata	Coding practice	Exercises across C++, Java, Python, Go, JavaScript, TypeScript, HTML, and CSS.

Explore more at github.com/walterfan?tab=repositories.

Technology Stack

GitHub Snapshot