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Senior Machine Learning Engineer, Prompt Security

SentinelOne

SentinelOne

Software Engineering, Data Science
Israel
Posted on Nov 18, 2025

About Us

At SentinelOne, we’re redefining cybersecurity by pushing the limits of what’s possible—leveraging AI-powered, data-driven innovation to stay ahead of tomorrow’s threats.

From building industry-leading products to cultivating an exceptional company culture, our core values guide everything we do. We’re looking for passionate individuals who thrive in collaborative environments and are eager to drive impact. If you’re excited about solving complex challenges in bold, innovative ways, we’d love to connect with you.

At Prompt Security, our mission is to empower organizations to safely harness the transformative power of Generative AI. As a one-stop security platform, we provide visibility, governance, and real-time protection against all Generative AI concerns, enabling organizations to innovate and prosper in the age of AI without compromising on security.

What are we looking for?

We’re seeking a skilled ML Engineer to play a crucial role in designing, developing, and maintaining our Protections Engine that powers our Generative AI Security platform. This includes working on our Classification Engine with NER and pattern-based classifiers —enabling real-time, adaptive security. The ideal candidate will have hands-on experience developing end to end data projects, as well as a solid understanding of security best practices for endpoint clients.

What will you do?

  • Design, develop, and optimize a hybrid classification engine that combines rule-based (regex) and NLP models to accurately classify entities.
  • Enhance and maintain Named Entity Recognition (NER) models to extract structured information from text and improve classification accuracy.
  • Work closely with data engineers and domain experts to analyze existing regex classifiers, identify coverage gaps, and design ML-driven solutions.
  • Develop data pipelines for model training, evaluation, and deployment, ensuring scalability and reliability in production environments.
  • Optimize existing data workflows and troubleshoot issues to enhance performance, latency and reliability.
  • Lead end-to-end data projects, from requirements gathering to deployment and monitoring.
  • Stay updated with industry trends and emerging technologies to continuously improve our data engineering practices.

What skills & knowledge should you bring?

  • 5+ years of proven experience in software development
  • Strong proficiency in Python
  • Experience with NER-based and Regex-based classification
  • Experience with Data/ML related projects
  • Experience with use of GenAI in production - Advantage
  • Experience with Rust or Golang - Advantage
  • Excellent problem-solving skills and attention to detail
  • Proactive attitude and ability to thrive in a dynamic startup environment
  • Communication and collaboration skills

SentinelOne is proud to be an Equal Employment Opportunity and Affirmative Action employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.

SentinelOne participates in the E-Verify Program for all U.S. based roles.