--- title: Real-Time Fraud Detection emoji: ๐Ÿ›ก๏ธ colorFrom: green colorTo: blue sdk: gradio sdk_version: 5.50.0 app_file: app.py pinned: false license: mit --- # ๐Ÿ›ก๏ธ Real-Time Credit Card Fraud Detection End-to-end fraud detection on the Sparkov dataset (1.85M transactions, ~0.5% fraud): - **Feature engineering** โ€” leakage-safe velocity, behavioral, and geo features - **Imbalance study** โ€” cost-sensitive vs SMOTE vs undersampling (honest comparison) - **Three models** โ€” LightGBM (PR-AUC 0.97) ยท GraphSAGE GNN ยท Autoencoder - **SHAP explainability** โ€” per-transaction reasons for compliance - **Concept-drift monitoring** โ€” PSI early warning - **Real-time scoring** โ€” single-digit-millisecond latency Source: [github.com/Fikri645/fraud-detection](https://github.com/Fikri645/fraud-detection) Built by [Muhammad Fikri Wahidin](https://github.com/Fikri645).