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Coding
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Coding
63 followers · 39 following

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Achievements

Achievement: QuickdrawAchievement: YOLOAchievement: Arctic Code Vault ContributorAchievement: Pull SharkAchievement: Starstruckx2

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RalfZhang/README.md
Road map of Xi'an's old walled city, drawn in ink in the style of InkCity

Hi, I'm Ralf 👋

Frontend & full-stack engineer · previously built for 100M+ users at Tubi and Alibaba

Open to work
📍 Bay Area · open to relocation · let's talk on LinkedIn

🏠 Website · 📝 Blog · 🤝 LinkedIn · 🌏 中文

💼 Experience

  • Tubi · 2022–2025 — led onboarding & growth for 100M users: sign-ups 40% → 60%, LCP 4.2 s → 2.5 s
  • Alibaba · 2019–2022 — built DingTalk Docs (100M+ users) and its sharing & permission SDK
  • Earlier · 2014–2019 — frontend at WTOIP and Kuaizi Tech (wrote Zender), full stack at Moonew

🚀 Things I've built

🎓 CSTU Course Enrollment
The university's live enrollment platform. I lead its development.
Next.js · Prisma · Stripe · GCP · Code

🧩 File Template
A VS Code extension that starts every new file from a template.
TypeScript · 36k+ ⏬

🦊 FoxAuth
A Firefox authenticator that autofills TOTP codes. I built its popup and autofill.
WebExtensions · 90+ ⭐

🗺️ InkCity
Your desktop wallpaper, redrawn every day as a different city's road map.
Tauri · Rust · React · Write-up

🎬 Vdo
Douban, rebuilt as a Material Design single-page app.
Vue · 260+ ⭐

🔔 Big Ben
A clock tower for social media. Every hour, on the hour: BONG!
Node.js · Docker · Douban, Threads, Mastodon

🧰 Toolbox

TypeScript React Node.js Next.js Rust Python PostgreSQL Storybook Jest Playwright Docker AWS GCP Vue Tauri WebExtensions

🤖 AI engineering

  • LLM APIs (Claude, Gemini) with structured outputs
  • LLM-as-judge evaluation
  • Local models via Ollama and Hugging Face diffusers (SDXL)
  • Daily AI-assisted development with Claude Code (sub-agents, MCP)

✍️ Latest writing

More posts →

Banner drawn from OpenStreetMap data · © OpenStreetMap contributors

Pinned Loading

  1. ink-city ink-city Public

    Your desktop wallpaper, redrawn every day as the road map of a different city.

    TypeScript 7

  2. Vdo Vdo Public

    Material Design-inspired single-page app

    JavaScript 269 56

  3. File-Template File-Template Public

    A VS Code extension for creating file from templates automatically.

    TypeScript 22 8

  4. FoxAuth/FoxAuth FoxAuth/FoxAuth Public

    UNOFFICAL A Firefox authenticator that can autofill TOTP codes with Firefox Android support

    JavaScript 97 23

  5. Zender Zender Public

    A lightweight MVVM engine

    JavaScript 3

  6. big-ben big-ben Public

    Big Ben on social medias

    JavaScript 10 1