Portfolio

Yujun Zhou

Data scientist and AI product builder

Economist by training, product thinker by practice. I bridge technology, data, and business, using data science and generative AI to reason, prototype, and build. Formerly at Meta learning how technology works at scale, now applying that perspective at Annalect and beyond.

Three working strengths

Economic thinking for causal, incentive-aware analysis
Data thought leadership that shapes product and strategy decisions
End-to-end data product building across modeling, backend, and UX

Toolkit

The capabilities I reach for most

Python
SQL
Machine Learning
Gen AI
Data Analysis
Data Visualization
Causal Inference

Selected work

Built, tested, and written for real decisions

Debrief

A FastAPI and React voice app for turning quick voice logs into a useful record of the day and week. It transcribes and classifies captures, surfaces daily and weekly AI reviews, tracks open loops, and helps users recover thoughts, tasks, recurring themes, and patterns over time.

React
FastAPI
TypeScript
PostgreSQL
OpenAI

Open

ChurchMap

A technical church discovery app that combines first-visit geolocation with a Leaflet/OpenStreetMap interface to make nearby church search automatic and easy. It enriches church profiles by extracting Google Places review, photo, rating, hours, and contact data, then uses computed tags and review signals to make the results more useful than a plain directory.