Jiaqi Yang
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Machine Learning

Model builds, evaluations, and deployment notes from recent ML work.

A/B Test Analysis: Progression Gate Impact in Cookie Cats

Jun 9, 2025

A complete walkthrough of designing, running, and interpreting an A/B test to optimize progression gate placement in the mobile game Cookie Cats.

A/B TestingGame AnalyticsRetention AnalysisMobile Games
Completed GitHub ↗

DEMO: Churn Prediction Pipeline DEMO

Nov 15, 2024

Placeholder ML project using XGBoost with feature store + FastAPI serving.

PythonXGBoostFastAPI
Completed GitHub ↗ Demo ↗

© Jiaqi Yang. ML/AI Engineer.