About DongDong Lee
I’m DongDong Lee (Chinese name 李冬冬, handle 2winter), a JavaScript full-stack developer and SEO/GEO consultant based in Shenzhen. With 8+ years of development experience, I focus on the intersection of “engineering × search visibility” — building my own sites, writing my own code, and driving my own traffic. This blog captures my hands-on practice and thinking around technical SEO, GEO (Generative Engine Optimization), and independent-site growth.
Certifications: Google GA4 · Google Search Product Expert · HubSpot SEO · SEMRush AI Search & Technical SEO · Yoast WordPress SEO
SEO Credentials
 |  | ||
|---|---|---|---|
| Yoast SEO | SEMRush | HubSpot SEO | GA4 |
Featured Work & Open Source
- Fennec SEO — an SEO/GEO audit tool covering Google, AI Overviews, ChatGPT, Perplexity and other search & AI citation surfaces, available on iOS / Android / Chrome / Edge.
- iHermes — an Expo-based, mobile-first Hermes client (Android / iOS / Web PWA), released open source.
- hexo-sitemap-html — an HTML sitemap generator plugin for Hexo, published on npm.
- YUSIHK — an SEO/GEO growth service site targeting the Hong Kong market.
Technical Focus
| Area | Stack |
|---|---|
| Frontend | React / Next.js (SSR/SSG), React Native / Expo, browser extension development (Chrome/Firefox) |
| Backend | Node.js, PHP (WordPress / Laravel), MySQL |
| Platforms | Shopify (Liquid), Wix, WordPress (Yoast/Rank Math customization), Hexo static sites |
| Search | Technical SEO, GEO/AISEO, structured data (Schema.org), Core Web Vitals, GSC data analysis |
Case Studies
- Hong Kong local business SEO: optimized Google Business Profiles and local landing pages, helping multiple restaurant and retail stores rank in Google’s top-3 “Local Pack”, boosting local search traffic by 60%+.
- Overseas Chinese education platform: developed a multi-region SEO strategy for Southeast Asia and North America, growing organic traffic 85% in 3 months; rich-result optimization lifted course-page CTR by 18%.
Contact
For collaboration and questions, see the contact page, or find me on LinkedIn or GitHub.