# David YC Tseng

> Builder, founder, and AI agent architect — shipping production agents and local-first Mac runtimes from Taipei. This site is a minimal portrait/linktree hub — projects ARE the content. Single locale: `/en`.

David YC Tseng is a product builder and AI agent architect based in Taipei. He co-founded Lootex, a cross-chain NFT marketplace that raised $9M and reached 80k+ MAU before shutting down in March 2026, and currently builds DAGRUN, a SwiftUI macOS agent runtime, and Polyox, a prediction market intelligence platform. Writes the Chinese-language Product Lab newsletter (1,000+ subscribers, since July 2022) and the daily AI Flash Note podcast.

## Pages

- [Home](https://davidyctseng.com/en): bio, role, and link tiles to projects and social channels
- [Projects](https://davidyctseng.com/en/projects): index of shipped products and writing
- [Contact](https://davidyctseng.com/en/contact): email with copy-to-clipboard

## Projects (internal detail pages)

- [Lootex](https://davidyctseng.com/en/projects/lootex): Cross-chain NFT marketplace for blockchain gaming. Co-founded and led product/engineering. Raised $9M seed, reached 140k+ wallets and 80k+ MAU. Featured as a Google Cloud case study.
- [Polyox](https://davidyctseng.com/en/projects/polyox): Prediction market intelligence platform aggregating Polymarket and Kalshi into unified consensus signals. AI agents trade autonomously across 2,100+ markets with $847M+ volume.
- [BYOF](https://davidyctseng.com/en/projects/byof): Bring Your Own Friends — a curated social introduction platform where trusted friends nominate and present you, flipping the dating app model. Running bi-monthly events in Taipei.
- [Correlate Health Insights](https://davidyctseng.com/en/projects/correlate): Privacy-first iOS journaling app that treats your life as a personal dataset. Track habits, discover which behaviors correlate with your outcomes. 5.0 stars on the App Store.
- [FoodCamAI](https://davidyctseng.com/en/projects/foodcam): iOS app using computer vision to make food logging instant. Point your camera at a meal to identify items and estimate nutritional content automatically.
- [Toki](https://davidyctseng.com/en/projects/toki): A beautifully minimal iOS date tracker with widgets. Count up or count down to the moments that matter — birthdays, anniversaries, deadlines, milestones.
- [AI Flash Note](https://davidyctseng.com/en/projects/ai-flash-note): Daily 10-minute Chinese-language AI podcast. Distilling signal from noise — covering model releases, tool updates, and industry shifts from OpenAI, Anthropic, DeepMind, and more.
- [Product Lab Newsletter](https://davidyctseng.com/en/projects/newsletter): Chinese-language newsletter on AI and Web3 for developers and entrepreneurs. 59+ long-form articles and 1,000+ subscribers since 2022. From Claude Code teardowns to market analysis.

## Projects (external — canonical info lives off-site)

- [DAGRUN](https://dagrun-preview-website.vercel.app/): Agent Local Task Orchestrator — a native Mac app that turns AI into accountable, local-first workflows. Data never leaves the machine. Models never lock you in.

## Elsewhere

- [LinkedIn](https://www.linkedin.com/in/davidyctseng/)
- [X / Twitter](https://x.com/davidyctseng)
- [Substack (Product Lab + AI Flash Note)](https://davidyctseng.substack.com)
- [Facebook](https://www.facebook.com/davidyctseng)

## Optional

- [llms-full.txt](https://davidyctseng.com/llms-full.txt): full project descriptions concatenated for single-shot ingestion
- [sitemap.xml](https://davidyctseng.com/sitemap.xml): machine-readable URL index for crawlers
- [Agent Card](https://davidyctseng.com/.well-known/agent-card.json): A2A protocol identity card (informational)