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Scientist / Senior Scientist, Ads Systems

San Mateo, CA💼 Full-time💰 $248,740–$248,740🗓 2026-07-15 → 2026-07-31

Core

Designing and leading offline model evaluation, building simulation models, and driving experimental design for Roblox's advertising marketplace to optimize ad delivery and targeting.

Role type

Senior Scientist, Ads Systems

Builds

Offline evaluation frameworks, simulation models for the ads marketplace, and principled measurement systems for incrementality.

Domain

Digital advertising, machine learning, and platform economics.

Deliverable

production ML models

Required skills

Data pipeline design and ownership, modeling for ad delivery and targeting, user segmentation and experimentation design, auction mechanics, statistical modeling, causal inference, Spark, Hive, Airflow

Preferred skills

Graduate degree in economics, statistics, bioinformatics, cognitive science, or physics

Technologies

Spark, Hive, Airflow

Responsibilities

Design and lead offline model evaluation end-to-end; Contribute to ads ML feature and model improvements; Build offline evaluation and simulation models for the ads marketplace; Lead experimental design and analysis for the ads domain; Design science roadmaps and experimentation agendas.

Seniority

Senior, hands-on IC

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