> Markdown version of [/jobs/ext/1321612-senior-data-scientist-detection](https://www.wearedevelopers.com/jobs/ext/1321612-senior-data-scientist-detection). 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, Detection - **Company:** CloudFlare - **Location:** New York, NY, United States - **Experience:** Expert - **Salary:** $185,000.0 - $231,000.0 - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Big Data, Python (Programming Language), Machine Learning, Software Engineering, Large Language Models, Production Code, Cloudflare - **Published:** July 17, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=c481145fbcf98a68 ## About the Role * Fraud and bots at scale. You have experience across fraud, abuse, and/or bot detection on large, high-velocity traffic. You may focus on one, but you transfer instincts between them. * Strong fundamentals, fluent in data. You have solid applied statistics, machine learning, and AI methodology fundamentals. You choose the right technique for the problem, and are fluent with large-scale data. * You have at least 5-7 years of experience professionally working in Data Science, ML Engineering, or Software Engineering. * You are very comfortable with Python & SQL in production environments., * At home in ground truth ambiguity. Building detections when ground truth is scarce is the heart of this job. You make real progress with weak, delayed, or absent labels and you're energized by adversaries that fight back. * You don't burn signals. You understand (or are curious to learn) how to act on detections without tipping your hand, knowing that how you deploy and respond can erode your future visibility. * Pragmatic about complexity. You know when a simple solution beats a complex one, and you don't chase small gains at disproportionate cost. * Disciplined in code. You apply strong programming and engineering best practices in both research and production code. * Impact-driven and clear. You connect your work to business impact and communicate clearly across technical and non-technical stakeholders. ## Description At Cloudflare, we're not looking for people who wait for a polished roadmap; we're looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a "normalized" problem and the AI-native curiosity to create a solution using the latest tools. Our culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up. If you're the type of person who values curiosity over bureaucracy, and that AI is a partner in solving tough problems to keep the Internet moving forward, you'll fit right in., Cloudflare's Engineering Team is home to some of the industry's top engineers, dedicated to building and scaling innovative software that handles a huge proportion of the Internet. Our Detection department sits at the heart of that mission: we identify automated, fraudulent, and malicious activity across the Internet and through our gateway. We develop advanced detection systems and machine learning models that operate at scale, collaborating with Product and Engineering teams across the company to protect our customers and stay ahead of the constantly evolving threat landscape., * Research, design, and evaluate detection models that identify automated, fraudulent, and malicious activity across Internet-scale data. * Dig into massive datasets to uncover the patterns and behaviors that distinguish adversaries from legitimate users. * Define how detection success is measured, designing metrics and evaluation strategies for problems where ground truth is noisy, delayed, or contested. * Stay current on emerging AI/ML research and evaluate how new techniques (e.g., LLMs, generative AI) can be applied to our products. * Partner with ML Engineers, Data Engineers, and Product to take detection approaches from research to production and measure their real-world impact. ## Related Videos - [Fireside Chat with Cloudflare's Chief Strategy Officer, Stephanie Cohen (with Mike Butcher MBE)](https://www.wearedevelopers.com/videos/1366-fireside-chat-with-cloudflare-s-chief-strategy-officer-stephanie-cohen-with-mike-butcher-mbe) - [Alibaba Big Data and Machine Learning Technology](https://www.wearedevelopers.com/videos/37-alibaba-big-data-and-machine-learning-technology) - [Designing the Future of Human<>Agent Collaboration](https://www.wearedevelopers.com/videos/1447-designing-the-future-of-human-agent-collaboration) - [Data Science in Retail](https://www.wearedevelopers.com/videos/586-data-science-in-retail) - [PySpark - Combining Machine Learning & Big Data](https://www.wearedevelopers.com/videos/44-pyspark-combining-machine-learning-big-data) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/886-webassembly-the-next-frontier-of-cloud-computing) ## Related Articles - [How to Become an AI Engineer](https://www.wearedevelopers.com/magazine/331-how-to-become-an-ai-engineer) - [How machine learning can help us tell fact from fiction](https://www.wearedevelopers.com/magazine/509-how-machine-learning-can-help-us-tell-fact-from-fiction) - [How to start an AI project for a good cause and boost your career](https://www.wearedevelopers.com/magazine/15-how-to-start-an-ai-project-for-a-good-cause-and-boost-your-career) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers)