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Lead Offensive Security Researcher (AI Agents)

refractal • Montenegro
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AI Summary

Lead offensive security research against AI agents and surrounding infrastructure, turning findings into detections, evaluations and defences. Red-team AI agents across browser, code, enterprise and multi-agent environments and research attack chains such as prompt injection, tool abuse and memory poisoning. Requires 6+ years in offensive security, original security findings, hands-on experience attacking LLM applications or agents, strong Python and a systems language, and clear communication.

Key Highlights
Lead offensive security research against AI agents and surrounding infrastructure
Red-team AI agents across browser, code, enterprise and multi-agent environments
Build automated attack tooling and reusable evaluation suites
Turn findings into detection rules, classifiers and policy controls
Lead customer assessments with clear, reproducible evidence
Key Responsibilities
Red-team AI agents across browser, code, enterprise and multi-agent environments
Research prompt injection, tool abuse, memory poisoning, identity and data-exfiltration attack chains
Build automated attack tooling and reusable evaluation suites that run in CI and for customers
Turn findings into detection rules, classifiers and policy controls with our engineers
Lead customer assessments and write findings that security leaders can act on

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Technical Skills Required
Python Offensive Security LLM Security
Benefits & Perks
Competitive equity
Pension contribution
Private medical and dental cover
Visa and relocation support

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Nice to Have
Working knowledge of MITRE ATLAS or the OWASP Top 10 for LLM applications
Montenegrin, Serbian, Bosnian or Croatian

Job Description

About Refractal

Refractal is an AI security company building the infrastructure organisations need to defend against autonomous AI threats. 2026 has shown that generally capable intelligence is here. The challenge now is modernising security to stop AI-enabled threats, whether they come from internal agents going rogue or from attackers using AI to become more dangerous.

Refractal was founded on cybersecurity and AI expertise from MIT, Microsoft, NASA and the U.S. Navy. Our product lets organisations detect AI-enabled threats at low cost without sacrificing detection quality. We take a practical approach to AI risk, combining proven cybersecurity methods with frontier AI security research.

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Job Overview
Posted Nov 07, 2026
Employment Full-time
Experience Mid-Senior level
Location Montenegro
Category Cyber Security
Company refractal
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