Senior Data Scientist, Detection

Cloudflare

Senior Data Scientist at Cloudflare researching and developing models for detecting Internet fraud and malicious activity. Collaborating with engineering teams to protect customers from evolving threats.

Posted 7/15/2026full-timeNew York City • New York • 🇺🇸 United StatesSenior💰 $185,000 - $231,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Expertise in designing and evaluating detection models for automated fraud and malicious activity, leveraging strong foundations in machine learning, statistics, and large-scale data analysis. Proven ability to collaborate with cross-functional teams to transition research into production while measuring real-world impact.

Highest-signal resume keywords

Python ProgrammingSQL ProficiencyMachine Learning FundamentalsApplied StatisticsFraud Detection Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Data ScienceML EngineeringSoftware EngineeringDetection Model DesignData Analysis

Industry Keywords

Fraud DetectionAbuse DetectionBot DetectionLarge-Scale DataAI/ML Research

Tech Stack

Tools & technologies

PythonSQL

About the role

Key responsibilities & impact

Research, design, and evaluate detection models that identify automated, fraudulent, and malicious activity across Internet-scale data.
Dig into massive datasets to uncover the patterns and behaviors that distinguish adversaries from legitimate users.
Define how detection success is measured, designing metrics and evaluation strategies for problems where ground truth is noisy, delayed, or contested.
Stay current on emerging AI/ML research and evaluate how new techniques can be applied to our products.
Partner with ML Engineers, Data Engineers, and Product to take detection approaches from research to production and measure their real-world impact.

Requirements

What you’ll need

5-7 years of experience professionally working in Data Science, ML Engineering, or Software Engineering.
Comfortable with Python & SQL in production environments.
Experience across fraud, abuse, and/or bot detection on large, high-velocity traffic.
Solid applied statistics, machine learning, and AI methodology fundamentals.
Fluent with large-scale data.

Benefits

Comp & perks

Medical/Rx Insurance
Dental Insurance
Vision Insurance
Flexible Spending Accounts
Commuter Spending Accounts
Fertility & Family Forming Benefits
On-demand mental health support and Employee Assistance Program
Global Travel Medical Insurance
Short and Long Term Disability Insurance
Life & Accident Insurance
401(k) Retirement Savings Plan
Employee Stock Participation Plan
Flexible paid time off covering vacation and sick leave
Leave programs, including parental, pregnancy health, medical, and bereavement leave