Polyglot Fraud Engine — C Velocity Core + Ruby Rules DSL + Python ML

A three-language fraud-detection engine for Chilean bank transactions,

Code and method Full README

This page shows the project's results. The methodology, the design decisions and the limitations are documented in the repository's README.

6.1.1 Modeling Approach Comparison — `make train-extra`

ROC curve comparison — Reading this honestly: the linear baseline already reaches 0.95+ PR-AUC

Activation comparison — Reading this honestly: the linear baseline already reaches 0.95+ PR-AUC

6.2 Observability: Prometheus + Grafana

Precision-Recall Curve

Confusion Matrix

Feature Importance