Sinclair Chen
Summary
👤
SeniorSinclair Chen is a founder and full‑stack engineer with a decade of experience building prediction markets, social products, and accessible web apps from prototype to production in the San Francisco Bay Area. As a founding engineer at Manifold Markets he shipped end‑to‑end features, led a zero‑downtime migration from Firebase to Postgres, and contributed front‑end accessibility and embeddability improvements to a widely used open‑source market platform. He’s launched and iterated startups (including Polylove) that blend product design, economic mechanism design, and community-first thinking, and he isn’t afraid to pivot when users reveal new needs. Known for pragmatic UX improvements that help both humans and AI agents, Sinclair combines technical craft with human-centered research and a futurist’s curiosity about better knowledge economies.
10 years of coding experience
Github Skills (7)
html10
css10
typescript10
typescripts10
front-end-development10
react10
typescript-types10
Programming languages (7)
Github contributions (5)
manifoldmarkets/manifold
Mar 2022 - Jan 2023
Manifold Markets: A market for every question
Role in this project:
Front-end Developer
Front-end DeveloperContributions:140 reviews, 490 commits, 539 PRs in 10 months
Contributions summary:Sinclair primarily focused on front-end development tasks, particularly related to user interface improvements. They implemented changes to improve the appearance and usability of existing components, such as removing resize handles, refactoring for better accessibility and performance, and improving the visual layout of several existing features. The user also integrated new features into existing code, such as adding functionality to embed markets into other platforms.
stock-marketquestionpythonmanifoldfinance
sipec/polylove
May 2024 - Apr 2026
farewell manifold, I will miss you for the next 100 years. please remember me~
Contributions:2 reviews, 9 PRs, 74 pushes in 1 year 10 months
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