Daan vanLeeuwen

Senior Data Scientist, Nokia - graph analytics · anomaly detection · LightGBM

Nokia

Rotterdam, Netherlands · CET (UTC+1)

4+ years experience

Sorbonne University

English, Dutch

Messaging unavailable

Overview

Currently at Nokia, where I work on fraud detection. Caught $2 million of fraud in the first year of the new models. Replaced 34 hand-built dashboards with one metrics layer people trust. Most at home with graph analytics and LightGBM. Learning Japanese, slowly.

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Working sessions on graph analytics

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Skills

rules enginesgraph analyticsanomaly detectionLightGBMSQL

Experience

Senior Data Scientist
Jul 2025 - Present
Nokia · 1 yr 3 mo · Full-time · Rotterdam, Netherlands
- Replaced 87 hand-built dashboards with one metrics layer people trust.
- Caught $7 million of fraud in the first year of the new models.
- Built the trust & safety models now used in 3 product decisions a quarter.
Data Scientist
Oct 2022 - Jul 2025
Spotify · 2 yr 9 mo · Full-time · Rotterdam, Netherlands
- Caught $6 million of fraud in the first year of the new models.
- Wrote the metric definitions the leadership team reviews every week.

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Education

Sorbonne University
Licence, Statistics
2018 - 2021

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