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Fraud Expense Anomaly Detection

RipplingHardMachine Learning00:00
Rippling
Your interviewer · Research Scientist
In session
Interviewer

Welcome to your interview for the Research Scientist role at Rippling.

The question is on your right: Fraud Expense Anomaly Detection. Take a moment with it first.

Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen. You have three graded attempts to score 7/10 or better.

Only Submit answer is graded - discussion is free practice.

Problem

How would you design an anomaly detection system to catch fraudulent expense reports with a highly imbalanced dataset at Rippling?