# David Jiang

> Principal of Theory A LLC. Former Google Wing/X and Apple Siri software engineer. Independent builder across finance, AI, data visualization, and classical Chinese thought.

## Orientation

- [Home](https://dj.theory-a.com/): Profile for David Jiang, including location, background, current work, projects, writing, garden, patent, and contact links.
- [Projects](https://dj.theory-a.com/projects): Selected software, finance, machine-learning, AI-native, writing, interview, and art projects with links and screenshots.
- [Writing](https://dj.theory-a.com/writing): Essays and writing pulled from Prismic, including bilingual writing where available.
- [Poems](https://dj.theory-a.com/writing/poems): Poetry and multilingual poem pages, including English, Chinese, and Sanskrit sections when available.
- [Resume Markdown](https://dj.theory-a.com/resume.md): Plain-text professional summary, project list, experience, links, and contact details.

## Profile

- [LinkedIn](https://www.linkedin.com/in/david-jiang-74618251/): Authoritative professional history and employment record.
- [GitHub](https://github.com/dlwjiang): Public code and project repositories.
- [Patent US10700950B2](https://patents.google.com/patent/US10700950B2/en): Patent listing for work attributed to Wei Jiang.
- [Idea Garden](https://garden.theory-a.com/): Connected digital garden of notes on psychology, philosophy, spirituality, finance, work, books, geopolitics, education, relationships, and reasoning.

## Projects — Finance

- [Theory A](https://www.theory-a.com/): Financial intelligence platform combining random-walk market priors, fundamentals, options context, and temporal visualization.
- [Options Chain Visualizer](https://www.theory-a.com/optionsChain/NVDA): Implied-move visualization using option contract breakevens and volatility context.
- [Kelly Game](https://www.theory-a.com/kellyGame): Interactive position-sizing trainer for understanding growth, risk, and betting fraction discipline.

## Projects — Machine Learning and AI

- [Komi Count](https://komi-count.theory-a.com): Fully local Go/Baduk image scorer using on-device computer vision and WebAssembly.
- [Neural Network Visualization](https://mnist.theory-a.com): Interactive MNIST neural-network explainer inspired by 3Blue1Brown-style visual pedagogy.
- [World History](https://world-history.theory-a.com): LLM-powered timeline and context tool for weaving historical events together.
- [A Casual Dao De Jing](https://a-casual-dao.theory-a.com/): Accessible reinterpretation of the Dao De Jing.
- [A Casual Gita](https://a-casual-gita.theory-a.com/): Companion reinterpretation project for the Bhagavad Gita.

## Projects — Writing, Interviews, Art

- [Meowmeow & Woofwoof](https://meowwoof.theory-a.com/gallery): Bilingual English/Chinese anthology of adult fables about liquid modernity.
- [Path & Play](https://www.youtube.com/@PathAndPlay): Interview series bridging China and the West.
- [Harmonious Rites](https://constitution.theory-a.com): Satirical constitutional project in the tradition of Lu Xun and Confucian critique.
- [Yuan Ling Tarot](https://tarot.theory-a.com): Custom tarot deck built around primal-spirit archetypes.

## Key Facts

- Name: David Jiang; alternate name: Wei Jiang.
- Website: https://dj.theory-a.com
- Contact: dj@theory-a.com
- Company: Theory A LLC.
- Location: San Mateo, California and Shanghai, China.
- Languages: English and Mandarin Chinese.
- Former roles: Google Wing/X, Apple Siri, Splunk, Neustar.
- Recurring topics: financial visualization, options pricing, AI applications, machine learning, data visualization, Daoism, Confucianism, Gestalt and somatic psychology, systems thinking, bilingual writing.
- Related sites: https://www.theory-a.com and https://garden.theory-a.com

## Contact

- Email: dj@theory-a.com
- Website: https://dj.theory-a.com
- LinkedIn: https://www.linkedin.com/in/david-jiang-74618251/
- GitHub: https://github.com/dlwjiang