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Production System

Fraud Risk Ops Platform

Model serving · policy decisions · audit trails · operations.

Turns model scores into policy-driven decisions with stable APIs, review workflows, audit trails, background jobs, and monitoring.

  • Fraud Detection
  • Risk Scoring
  • Model Serving
  • Threshold Policies
  • Audit Logging
  • Monitoring
Fraud Risk Ops Platform

Problem

Fraud scoring only becomes useful when analysts can act on model output through clear thresholds, review queues, audit trails, and monitoring signals.

Approach

  • Separates model scoring, policy decisions, validation, audit trails, persistence, batch jobs, and monitoring so each layer can be reviewed independently.
  • Uses configurable threshold policies to turn calibrated risk scores into approve, decline, or review actions without changing the model artifact.
  • Pairs the FastAPI inference service with an analyst-facing Streamlit console for score review, diagnostics, and operational decision support.

Signals & Results

  • Operational boundary: model score → policy decision → audit trail → review workflow → monitoring.
  • Engineering evidence: versioned API contracts, readiness checks, persisted jobs/audit records, Redis-backed worker flow, Prometheus metrics, Grafana provisioning, Docker, and CI.

Stack

  • Python
  • FastAPI
  • Pydantic
  • Streamlit
  • scikit-learn
  • XGBoost
  • Docker
  • Redis
  • SQLite
  • Prometheus
  • Grafana
  • pytest
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