AdWords Fraud Detection
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Production AI Engineering  ·  Project 06

AdWords Fraud Detection

Graph-based detection infrastructure and reviewer tooling that protected the ad exchange ecosystem at global scale.

Company
Google
Year
2018–2019
Role
ML Engineer & Platform Lead
200+ Fraud reviewers empowered by the platform
Millions Abusive accounts identified across the ecosystem
VP Award Recognized for ecosystem integrity impact
The Challenge

The Problem

Adityagen.ai built detection infrastructure that empowered 200+ fraud analysts to identify millions of abusive accounts — converting individual review into coordinated, ring-level intelligence.

The ad exchange ecosystem faced coordinated abuse at massive scale — fraud networks operating across millions of accounts with behavioral patterns that individual account review could never catch. Manual review processes were reactive and slow, unable to surface the ring-and-chain relationships that distinguished coordinated fraud from isolated violations.

The detection challenge was compounded by the scale of data involved: processing massive volumes of account behavioral data in near-real time while maintaining accuracy high enough to avoid penalizing legitimate advertisers. Continuously evolving fraud patterns required the system to be architecturally adaptable, not just accurate at point-in-time.

"The goal wasn't to catch more fraud — it was to give 200 human reviewers the intelligence to catch fraud that no single person could ever see alone."

System Architecture

System Design

AdWords Fraud Detection Architecture
Component 01
Anomaly Detection Engine
Feature extraction across large volumes of account behavioral data. Suspicious pattern detection and abuse identification at ad exchange scale. Continuously updated detection models adapting to evolving fraud patterns.
Component 02
Account Review Platform
Data aggregation and relationship/similarity scoring per account. Ring and chain visualization for intuitive reviewer decision-making. Bulk suspension enablement multiplying reviewer throughput. Graph-based relationship scoring turning complex fraud network signals into actionable visual intelligence.
Key Innovations
Graph-based relationship scoring turning complex fraud network signals into actionable visual intelligence
Ring/chain visualization enabling reviewers to identify coordinated abuse patterns in seconds
Bulk abuse detection and suspension workflow multiplying the effective output of the 200+ reviewer team
Reviewer decision intelligence platform combining anomaly signals with relationship context
Outcomes & Impact

Results

AdWords Fraud Detection Impact
VP Award Winner
Recognized for ecosystem integrity impact and measurable business ROI
200+ reviewers
Empowered with graph intelligence
to protect millions of accounts
Millions
Abusive accounts identified —
ecosystem integrity restored

The platform identified millions of abusive accounts, strengthening the integrity of the ad exchange advertising ecosystem at global scale. By empowering 200+ reviewers with intelligent tooling — graph visualization, similarity scoring, and bulk actions — the system multiplied human reviewer capacity without adding headcount.

The project earned a VP Award, reflecting its significant financial and operational impact on one of the company's most revenue-critical platforms. Mentorship delivered during this project contributed directly to L4 → L5 technical lead promotions across the team.

My Role

Technical Leadership & Team Development

  • Mentored multiple engineers across the project, with direct contributions to L4 → L5 technical lead promotions
  • Provided technical leadership across workstreams including detection, visualization, and review tooling
  • Fostered a culture of cross-team collaboration that extended impact beyond the immediate project scope
Tech Stack
Backend
Java
Frontend
AngularJS
Data
Flume Apache Beam
ML
Anomaly Detection Models Graph-based Relationship Scoring