> Markdown version of [/jobs/ext/278108-senior-data-scientist-alt-defense](https://www.wearedevelopers.com/jobs/ext/278108-senior-data-scientist-alt-defense). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior Data Scientist - Alt Defense

- **Company:** Roblox
- **Location:** San Mateo, CA, United States
- **Experience:** Expert
- **Salary:** $263,670.0 - $322,820.0
- **Contract:** Permanent contract
- **Skills:** Airflow, Data Analysis, Big Data, Information Engineering, Apache Hive, Python (Programming Language), Machine Learning, SQL Databases, Scripting, Apache Spark, Deep Learning, Information Technology, User Generated Content
- **Published:** May 19, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=f0d82765f588cc86

## About the Role

* 8+ years of industry experience in data science, economics, analytics, or machine learning engineering
 * 6+ years of experience using scripting languages (Python, R), and big data query/processing languages and tools such as SQL, Hive, Spark, and Airflow
 * Knowledge of ML and Deep Learning either via formal training or industry experience
 * Ability to apply creative first-principles reasoning to solve ambiguous problems
 * Experience developing large-scale safety or moderation systems as well as experience with content platforms, specifically user-generated content
 * Advanced Degree and/or PhD in Statistics, Computer Science, Physics, Applied Math, Economics, or other related quantitative fields

## Description

* Develop ground truth evaluation strategies by integrating diverse signals, ranging from "gold standard" manual labels to automated weak supervision frameworks.
 * Calibrate score thresholds across applications, balancing high-precision enforcement needs with high-recall required for growth reporting
 * Partner with MLE to identify and validate new behavioral, network, and biometric signals to expand detection coverage.
 * Collaborate with Engineering to design modular systems capable of processing billions of candidate pairs and supporting high-concurrency graph traversals.
 * Lead the cross-functional integration of identity models into Discovery, Ads, and Creator Success to eliminate fraud and improve the fidelity of platform metrics.
 * Conduct strategic research to decode the incentives behind alt creation and develop sophisticated classification taxonomies to guide mitigation strategies.
 * Communicate strategic insights and present recommendations to leadership and all cross-functional partners, translating complex statistical findings on prevalence, ground truth quality, and effectiveness into actionable strategies for Product, Engineering, Policy, Compliance, and Legal.
 * Partner with ML and Data Engineering teams to ensure model development, reporting, and detection systems are built on statistically sound ground truth and measurement frameworks.


## Related Videos

- [Alibaba Big Data and Machine Learning Technology](https://www.wearedevelopers.com/videos/37-alibaba-big-data-and-machine-learning-technology)
- [Data Science in Retail](https://www.wearedevelopers.com/videos/586-data-science-in-retail)
- [From Messy Queries to Scalable Systems - How Data Engineering actually works](https://www.wearedevelopers.com/videos/100203-from-messy-queries-to-scalable-systems-how-data-engineering-actually-works)
- [JavaScript? No. Java Scripts! - Scripting with Java](https://www.wearedevelopers.com/videos/2094-javascript-no-java-scripts-scripting-with-java)
- [How Data is Shaping our Games](https://www.wearedevelopers.com/videos/176-how-data-is-shaping-our-games)
- [PySpark - Combining Machine Learning & Big Data](https://www.wearedevelopers.com/videos/44-pyspark-combining-machine-learning-big-data)

## Related Articles

- [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)
- [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing)
- [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers)
- [How to Become an AI Engineer](https://www.wearedevelopers.com/magazine/331-how-to-become-an-ai-engineer)
- [Dev Digest 137 - AI'm not sure about this](https://www.wearedevelopers.com/magazine/485-dev-digest-137-ai-m-not-sure-about-this)
- [Dev Digest 129 - Now that's what I call private data!](https://www.wearedevelopers.com/magazine/468-dev-digest-129-now-that-s-what-i-call-private-data)