Senior Software Engineer, Agentic Systems

What this role involves

Horizon3.ai seeks a Senior Software Engineer to build an autonomous web application penetration testing agent. The role involves developing the agent harness, orchestration, and evaluation infrastructure, translating offensive expertise into reliable LLM-driven capabilities. The position is remote and requires 5+ years of production software experience with strong Python and LLM applications.

Skills this posting asks for

• python
• llm
• tool use
• function calling
• structured outputs
• orchestration
• aws bedrock
• evaluation infrastructure
• prompt engineering
• context engineering
• production software
• agentic systems
• autonomous agents
• penetration testing
• security

Requirements

• 5 years of experience
• Level: senior
• Remote policy: remote

From the employer’s posting

Get to Know Us Horizon3.ai http://Horizon3.ai is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find, fix, and verify exploitable attack vectors before criminals exploit them. Our flagship product, the NodeZero™ platform, delivers pro…