Senior Applied ML Research Engineer, Agentic Security

Responsibilities

• Define and validate threat models for agentic systems, identifying which tool characteristics must co-exist to enable data exfiltration and malicious state change, and how to break those combinations
• Design and run experiments: create synthetic environments like file systems and tools, create task distributions that have attack paths and apply different attack strategies
• Break (manually and using optimization algorithms such as RL) agentic systems
• Design and improve static and dynamic analysis methods that automatically map tool capabilities to risk across diverse tool ecosystems, and make those methods scale
• Turn research insights into product-facing capabilities: risk classification, automated guardrail generation, and quantitative threat measurement
• Build measurement tools: eval harnesses, monitoring, dashboards, and feedback loops that quantify security outcomes
• Build capability and regression evals
• Optimize systems for real-world constraints (latency, cost, reliability) without losing scientific rigor

Requirements

• MS or PhD in CS/ML (or equivalent research experience) and enjoy working under uncertainty
• Fine-tuned and evaluated models in practice and can reason about data quality, overfitting, evals, and deployment constraints
• Write strong production code, comfortable owning the infrastructure that makes agentic evals run end-to-end; care about reproducibility and instrumentation
• Motivated by security problems and enjoy thinking like both builder and attacker
• Reason about how capabilities combine into risk: not just individual vulnerabilities, but system-level attack surfaces across tool ecosystems
• Communicate clearly, iterate fast, and can hold a technical narrative from "hypothesis" to "shipped"

Compensation & Benefits

• Competitive salary + equity
• Remote-friendly, with preference for candidates based in Amsterdam, Paris, Poland, New York, or San Francisco
• Fully funded team retreats every 8 weeks
• Health insurance allowance for you and your dependents
• Wellbeing, learning, and home office allowances