Horizon3.ai, Inc. logo

Staff Attack Engineer, AI/LLM

Job Overview

Location

US, Remote

Job Type

Full-time

Category

Cybersecurity

Date Posted

April 11, 2026

Full Job Description

📋 Description

  • Staff Attack Engineer specializing in AI/LLM security to break AI and agentic systems and turn research into automated attacks inside the NodeZero autonomous pentesting platform.
  • Design and execute prompt injection, defense evasion, tool-use exploitation, and infrastructure attacks targeting AI systems; conduct threat modeling and productize manual techniques into scalable, reliable attack modules.
  • Build and extend LLM-powered applications with focus on cost, safety, hallucination guardrails, reliability, and observability; design microservices orchestrating LLM tasks integrated with NodeZero.
  • Join a fast-growing remote cybersecurity company founded by former U.S. Special Operations cyber operators, startup engineers, and frustrated practitioners; mission-driven team focused on proactive threat detection and fixing exploitable attack vectors before criminals exploit them.

Skills & Technologies

Python
Neo4j
AWS
Azure
GCP
Senior
Remote
$223k-275k

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Horizon3.ai, Inc. logo
Horizon3.ai, Inc.
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About Horizon3.ai, Inc.

Horizon3.ai provides autonomous security testing and attack surface management software. Its NodeZero platform continuously assesses enterprise networks, clouds, and applications to find exploitable weaknesses, validate fixes, and prioritize risks. The company serves Fortune 500, government, and mid-market organizations seeking proactive defense without manual red teams.

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