Remote Staff Software Engineer, Defensive Agent

Horizon3

Emma

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Full-time

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Remote (for United States residents)

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18 days ago

Description:Lead the technical work for NodeZero's defensive agents, translating attack paths into actionable remediation.Collaborate with AI researchers and engineers to develop the platform, owning the technical strategy for autonomous remediation.Requirements:Bachelor's Degree in Computer Science or related field.7+ years of software engineering experience with modern languages (Python, Go, etc.) and cloud platforms (AWS, Azure, GCP).Experience with agentic systems, SQL, and designing distributed systems in production.Proven track record of shipping and operating production services.Benefits:Inclusive team culture promoting diversity and growth opportunities.Hybrid and remote work options available.Competitive salary range of $229,000-$270,000 annually, plus equity options and comprehensive health benefits.

Expert

AWS

GCP

Microsoft Azure

Python

Software engineering

Proficient

Agentic systems

Distributed systems

SQL

User since: Aug 2026

User since: Jun 2026

About Horizon3:

Horizon3.ai answers the two most important questions in cybersecurity: If someone tried to compromise us, would we hold up? And, how do we withstand the onslaught of AI-powered attacks? Horizon3.ai’s NodeZero® shifts the advantage from attackers to defenders by giving organizations the power to fight AI with AI. The Proactive Security Platform autonomously tests your defenses at machine speed, safely finds and prioritizes exploitable attack paths, instantly verifies fixes, and drives a continuous loop so you can prove you’re resilient, not just hope you are. NodeZero, the World’s Best AI Hacker™, was built by an elite team of U.S. cyber veterans and has honed its skills over 225K production-safe tests, more than all manual pentests in history. More than 5,000 organizations including the NSA, CISA, Fortune 100 giants, and major healthcare providers trust Horizon3.ai to prioritize what matters and prove they’re ready for what’s next. Horizon3.ai has been recognized by Fast Company as one of the World’s Most Innovative Companies in 2026. The company ranked #3 overall on the 2025 Deloitte Technology Fast 500 and was named the #1 cybersecurity company on the Inc. 5000 in 2025. It has also been named to the Fortune Cyber 60 in both 2023 and 2025 and is a two-time Black Unicorn Award winner.

Reputation:

Domain created: Dec 2017

www.horizon3.ai/

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Remote Staff Software Engineer, Defensive Agent

Emma

Responsibilities

Skills wanted:

Language(s) required:

Torie Runzel