Maya Sana Malhotra

Head of Data, Saffron Ops - LightGBM · rules engines · graph analytics

Saffron Ops

Madrid, Spain · CET (UTC+1)

11+ years experience

Humboldt University of Berlin

English, Spanish

Messaging unavailable

Overview

Head of Data at Saffron Ops, focused on fraud detection. Caught $7 million of fraud in the first year of the new models. Most at home with graph analytics and LightGBM. Plant-based cook and baker.

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Skills

LightGBManomaly detectiongraph analyticsPythonSQLrules engines

Experience

Head of Data
Feb 2023 - Present
Saffron Ops · 3 yr 8 mo · Full-time · Madrid, Spain
- Caught $6 million of fraud in the first year of the new models.
- Taught SQL to 187 non-analysts.
- Replaced 55 hand-built dashboards with one metrics layer people trust.
Senior Data Scientist
Apr 2019 - Feb 2023
Telefónica · 3 yr 10 mo · Full-time · Madrid, Spain
- Taught SQL to 70 non-analysts.
Data Analyst
May 2017 - Apr 2019
Bolt · 1 yr 11 mo · Full-time · Madrid, Spain
- Taught SQL to 175 non-analysts.
- Wrote the metric definitions the leadership team reviews every week.
Data Scientist
Dec 2015 - May 2017
McKinsey & Company · 1 yr 5 mo · Full-time · Madrid, Spain
- Taught SQL to 150 non-analysts.
- Wrote the metric definitions the leadership team reviews every week.

Projects

Fraud detection benchmark

2026

Reproducible benchmarks comparing LightGBM and anomaly detection on real workloads.

Write-up: fraud detection in practice

2022

A long-form guide to fraud detection for people starting out.

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Education

Humboldt University of Berlin
BA, Statistics
2012 - 2015

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