谢园 Jacob Xie
A full-stack developer who ships complete products with AI coding agents — and a quant researcher.
What I can do for you
Ship an app or web product from scratch
Subscriptions, multiple languages, AI features — from spec to the App Store.
Booking systems with smart-lock integration
Bookings, approvals and permissions, with lock passcodes issued and revoked automatically.
Quant research infrastructure & backtest audits
Futures data pipelines, Nautilus Trader, cross-validation and backtest checks.
Work
Hotari
A habit-tracking RPG. Log what you did; an AI "scribe" writes a note on your day, and a skill tree and five attributes make your growth visible. Live on the App Store as Hotari, and in mainland China as 萤火轨迹.
Church venue booking & smart-lock access
Built pro bono for a large church. Its volunteer teams book rooms online; once a booking is approved, the system sends a time-limited passcode to the door lock, revokes it on expiry, and traces every unlock back to the passcode used. Currently in beta.
quantlab: a futures research framework
A futures research and backtesting framework on Nautilus Trader, built on the methods of López de Prado's Advances in Financial Machine Learning. The goal isn't "find a profitable strategy" — it's making every conclusion hold up.
Contact
Available for remote work, per project or monthly. jacobxie@hotmail.com