Skip to main content
Engineering, Data / ML, Uber AI

Risk Entity Watch – Using Anomaly Detection to Fight Fraud

28 September 2023 / Global
Featured image for Risk Entity Watch – Using Anomaly Detection to Fight Fraud
Image
Figure 1: Risk Entity Watch Overview
Image
Figure 2: Entities and Events
Image
Figure 3: Entity Feature Generation Pipeline
Image
Figure 4: A calculation on the number of features created for a particular checkpoint
Image
Figure 5: A calculation on the number of features created across all checkpoints
Image
Figure 6: A hypothetical but realistic set of parameters
Image
Figure 7: HAIFA intuition 
Image
Figure 8: HAIFA histograms X (left) & Figure 9: HAIFA histograms Y (right)
Image
Figure 10: Negative correlation observed between anomaly and bucket thresholds
Image
Figure 11: ML Engineer Workflow
Image
Figure 12: Model Tuning – (Left) Pie Chart of anomaly reasons & (Right) Scatter plot of anomaly score and feature values
Sergey Zelvenskiy

Sergey Zelvenskiy

Sergey Zelvenskiy is a Lead Engineer on the Risk Entity Watch project with the Uber Risk Machine Learning Engineering team based in Sunnyvale, CA. Sergey loves perfecting his pour-over coffee techniques and exploring vibrant cities all over the world.

Becky Hui

Becky Hui

Becky Hui is a Machine Learning Engineer on the Risk team and builds real time solutions to combat fraud in the marketplace. In her spare time, Becky enjoys building Lego sets and traveling the world.

Sahana Noru

Sahana Noru

Sahana Noru is currently a sophomore at UC Berkeley specializing in Computer Science. She interned with the Risk Applied ML Team at Uber during Summer 2022 and worked on the Risk Entity Watch Platform. During her free time, she enjoys reading and cooking different desserts.

Christopher Settles

Christopher Settles

Christopher Settles is a Machine Learning Engineer on the Risk team who builds the machine learning infrastructure that helps data scientists across the risk platform leverage real time signals in their models. In his free time, Chris loves exploring national parks and hacking together AI projects.

Posted by Sergey Zelvenskiy, Becky Hui, Sahana Noru, Christopher Settles