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Senior Security Researcher and Principal Security Researcher (Multiple Positions)

United States, Washington, Redmond💼 Full-time🗓 2026-07-28 → 2026-09-26

Core

Design and build end-to-end evaluation harnesses for agentic security and engineering workflows, creating benchmark suites and automated grading pipelines to measure model safety, correctness, and efficiency.

Role type

Senior/Principal Security Researcher (AI Agent Evaluation)

Builds

Evaluation harnesses, benchmark datasets, automated graders, and integration into CI/CD release gates.

Domain

AI Security / Agentic Workflows / Model Evaluation

Deliverable

production ML models | product features

Required skills

software engineering, system design, LLMs and AI agents, model evaluation, prompt orchestration, security engineering, vulnerability management, statistical analysis, automation workflows, structured data processing, regression analysis, human-review protocols

Preferred skills

experience with SAST/SCA, SARIF, secure development lifecycle, compliance-sensitive systems, experimentation design, quality measurement systems

Technologies

LLMs, AI agents, SAST, SCA, SARIF, CI/CD, APIs, automation frameworks

Responsibilities

Design and implement evaluation systems end-to-end including task definition, dataset creation, harness implementation, scoring, and operational integration. Create representative benchmark suites and golden datasets covering normal, edge, adversarial, and production-derived cases. Integrate evaluations into engineering workflows and release gates to support reproducible evidence before production rollout. Detect regressions, benchmark drift, and cases where eval scores improve while real-world outcomes do not. Partner with agent builders and product teams to turn evaluation results into release recommendations and autonomy-boundary decisions. Convert learnings into reusable paved paths including playbooks, templates, dashboards, and reference implementations.

Seniority

Senior/Principal, hands-on IC with strategy & mentorship

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