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Financial Crime Detection Platform

End-to-end fraud detection system processing real-time transaction streams. From Kafka ingestion through PySpark feature engineering to MLflow-managed models, with autonomous LangChain agents that investigate flagged cases using RAG retrieval over historical fraud patterns.

92.3%

Precision

at 88.7% recall

187ms

p99 Latency

real-time scoring

21,000%

ROI

$210 saved per $1 invested

67%

Automation

case auto-resolution

Architecture
Layer 1

Ingestion

KafkaPySpark Structured StreamingSchema Registry
Layer 2

Feature Engineering

PySparkFeature StoreBatch + Real-time Pipelines
Layer 3

Model Training

MLflowScikit-learnXGBoostHyperparameter Tuning
Layer 4

Scoring

FastAPIRedis CacheModel RegistryA/B Testing
Layer 5

Investigation

LangChainChroma Vector DBRAG PipelineCase Management
Layer 6

Monitoring

GrafanaPrometheusDrift DetectionAlert Rules
Pipeline Flow
01 — Ingest

Real-Time Stream Processing

Kafka ingests transaction events at scale. PySpark Structured Streaming applies schema validation, deduplication, and windowed aggregations with exactly-once guarantees.

02 — Score

ML Model Inference

Feature vectors feed into XGBoost models managed by MLflow. Redis caches hot features for sub-200ms scoring. A/B testing compares model versions in production.

03 — Investigate

Autonomous AI Agents

LangChain agents receive flagged transactions, retrieve similar cases from Chroma vector DB via RAG, apply investigation logic, and auto-resolve 67% of cases without human intervention.

Stack
PySparkKafkaMLflowFastAPILangChainChromaPostgreSQLRedisDockerGrafanaPrometheusXGBoost

This platform demonstrates end-to-end data engineering and AI capabilities -- from streaming ingestion through model lifecycle management to autonomous investigation.

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