Katie Crawford

Senior Data Scientist at Saffron Data · graph analytics, rules engines

Saffron Data

San Francisco, CA · PT (UTC-8)

4+ years experience

University of Michigan

English

Messaging unavailable

Overview

Senior Data Scientist at Saffron Data, focused on fraud detection. Built the trust & safety models now used in 12 product decisions a quarter. Before that: Snap and EY.

Good reasons to reach out

Questions about fraud detection
Thoughtful intros to people in my field

Please don't message about

Generic networking requests
SEO and link-building offers
Agency or outsourcing pitches

Fastest replies in the morning

Skills

graph analyticsanomaly detectionrules enginesSQLLightGBM

Experience

Senior Data Scientist
May 2026 - Present
Saffron Data · 5 mo · Full-time · San Francisco, CA
- Replaced 52 hand-built dashboards with one metrics layer people trust.
- Cut false positives on payment blocks by 49%.
Data Scientist
Apr 2024 - May 2026
Snap · 2 yr 1 mo · Contract · San Francisco, CA
- Taught SQL to 40 non-analysts.
Data Analyst
Oct 2022 - Apr 2024
EY · 1 yr 6 mo · Full-time · San Francisco, CA
- Caught $3 million of fraud in the first year of the new models.

Projects

Open-source LightGBM toolkit

2026

A small library for fraud detection that 404 developers star on GitHub.

References

No references yet.

Education

University of Michigan
BSE, Mathematics
2017 - 2021

Details

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