JOB DETAILS

Gen AI Security Researcher

CompanyActiveFence
LocationLondon
Work ModeOn Site
PostedDecember 14, 2025
About The Company
ActiveFence is the leading provider of AI security and safety solutions, protecting online experiences and AI applications for over 3 billion users, top foundation models, and the world’s largest enterprises and tech platforms. As a trusted partner to major technology companies and Fortune 500 brands, we secure user-generated and GenAI products against prompt injection, adversarial attacks, and harmful content through Real-Time Guardrails, continuous Red Teaming, and the industry’s most advanced threat intelligence. With unmatched detection capabilities in 117+ languages, ActiveFence empowers organizations to deliver engaging, safe, and trustworthy experiences globally, helping them innovate responsibly while staying ahead of emerging threats.
About the Role

As a GenAI Security Researcher, you’ll dive deep into the challenges of AI safety, conducting redteaming operations to identify vulnerabilities in generative AI systems and their infrastructure.

You will conduct redteaming operations for finding and addressing risks to ensure AI models are robust, secure, and future-proof.

As a Security Researcher, you will:

  • Conduct sophisticated black-box redteaming operations to uncover vulnerabilities in generative AI models and infrastructure.
  • Design new techniques to bypass the latest AI security mechanisms.
  • Evaluate and strengthen the security of AI systems, identifying weaknesses and collaborating to implement improvements.
  • Work with cross-functional teams to automate security testing processes and establish best practices.
  • Stay ahead of emerging trends in AI security, ethical hacking, and cyber threats to ensure we’re at the cutting edge.

Requirements


Must Have

  • 3+ years in offensive cybersecurity, especially focused on web applications and API security OR Advanced Ph.D. Candidates with a proven record of research in AI/Cybersecurity
  • Strong programming and scripting skills (e.g., Python, JavaScript) relevant to AI security.
  • In-depth understanding of AI technologies, particularly generative models like GPT, DALL-E, etc.
  • Solid knowledge of AI vulnerabilities and mitigation strategies.
  • Excellent problem-solving, analytical, and communication skills.

Preferred Skills That Set You Apart:

  • Certifications in offensive cybersecurity (e.g., OSWA, OSWE, OSCE3, SEC542, SEC522) OR Master's degree and above in Computer Science with a focus on Data Science or AI.
  • Experience in end-to-end product development, including infrastructure and system design.
  • Proficiency in cloud development.
  • Familiarity with AI security frameworks, compliance standards, and ethical guidelines.
  • Ability to thrive in a fast-paced, rapidly evolving environment.

About ActiveFence

ActiveFence is the leading provider of security and safety solutions for online experiences, safeguarding more than 3 billion users, top foundation models, and the world’s largest enterprises and tech platforms every day. 

As a trusted ally to major technology firms and Fortune 500 brands that build user-generated and GenAI products, ActiveFence empowers security, AI, and policy teams with low-latency Real-Time Guardrails and a continuous Red Teaming program that pressure-tests systems with adversarial prompts and emerging threat techniques. Powered by deep threat intelligence, unmatched harmful-content detection, and coverage of 117+ languages, ActiveFence enables organizations to deliver engaging and trustworthy experiences at global scale while operating safely and responsibly across all threat landscapes.

Key Skills
AI Vulnerabilities AnalysisGenerative ModelsWeb Penetration TestingAnalytical SkillsProblem-Solving SkillsCommunication SkillsPythonNodeJSOffensive Cybersecurity CertificationsAgentic FrameworksVulnerability DisclosureRisk AnalysisMitigation StrategiesDocumentationResearchInnovation
Categories
TechnologySecurity & SafetyData & AnalyticsEngineeringScience & Research
Job Information
📋Core Responsibilities
Conduct analysis and testing of generative AI systems to enhance security. Identify weaknesses, assess risks, and provide recommendations for improvement.
📋Job Type
full time
📊Experience Level
5-10
💼Company Size
357
📊Visa Sponsorship
No
💼Language
English
🏢Working Hours
40 hours
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