akshayama-ds/payment-fraud-detection
ML fraud detection system scoring 590K+ transactions at <80ms | XGBoost + LightGBM ensemble | 87% recall, 0.84 PR-AUC, 2.1% FPR | SMOTE, cost-sensitive threshold ($200 FN/$15 FP), SHAP explainability (GDPR Art.22), FastAPI + Redis deployment | $3.2M annual business impact
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MIT
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Last pushed
Mar 15, 2026
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