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Data Scientist for Machine Learning Team

Barcelona💼 Full-time🗓 2026-09-19 → 2026-09-23

Core

Bridge the gap between theoretical model design and real-world production reality for an ultra-low-latency recommender system matching ads to users in milliseconds.

Role type

Senior IC machine learning engineer (ad-tech)

Builds

Core Deep Neural Networks models within a high-frequency, complex auction ecosystem

Domain

Ad-tech / Programmatic advertising

Deliverable

production ML models

Required skills

Deep Neural Networks (DNN) modeling, Statistical rigor (Probability theory), Hypothesis formulation and validation, A/B testing design, System performance optimization, Python, SQL

Responsibilities

Analyze model behavior in live auctioned environments to understand interactions with market dynamics, Design and analyze experiments to validate hypotheses regarding bidding strategies, Identify performance bottlenecks and propose architectural or feature enhancements, Train and analyze DNN models to compare results and drive measurable improvements in live bidding performance

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