Horizon3
Open positions
Federal Platform Engineer
We are looking for a Federal Platform Engineer to help lead the deployment and operation of our product infrastructure in multiple federal environments ranging from FedRAMP through Classified workloads Your goal will…
Senior Backend Engineer (Integrations)
You’ll be joining the Platform Integration Team (PIT Crew) — a high-impact group whose mandate is critical to the scalability and extensibility of the NodeZero platform. The PIT Crew’s mission is to transform…
Federal Backend Engineer
The Federal - Senior Backend Engineer will be joining one of our world-class software engineering teams, and will be a key contributor to both user-facing product launches as well as platform enhancements and…
Staff Front End Software Engineer
We are looking for a Staff Software Engineer to join our Core Front-End team and help shape the future of the user experience across the Horizon3 NodeZero platform This is not a traditional feature team role. The Core…
Senior Marketing Operations & Analytics Manager
Get to Know Us Horizon3 is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find and fix and verify exploitable attack vectors before criminals exploit…
Staff Developer Experience Engineer (Developer Experience)
We are looking for a Senior OR Staff Developer Experience Engineer to help shape how Horizon3 engineers build, test, release, and operate software The Developer Experience team owns the foundations connecting local…
Principal Software Engineer (Autonomous Defense)
We are hiring a Principle Software Engineer to lead the technical work for NodeZero’s defensive agents: the systems that translate proven attack paths into continuous actionable remediation You’ll set direction…
Senior Backend Engineer (Autonomous Defense)
As a Senior Backend Engineer on the Defensive Agent team, you’ll build the platform that NodeZero’s defensive agents run on. Our AI researchers define what these agents should reason about, you build the systems that…
Applied AI Engineer (Autonomous Defense)
We’re looking for an AI Researcher to build the agents that turn our offensive knowledge into defensive action You’ll build agents that reason from a proven attack path to the specific control changes that break it -…
Senior Machine Learning Engineer (Autonomous Defense)
As a Senior Machine Learning Engineer on the Defensive Agent team, you’ll be the person who gets our defensive models into production and keeps them there Our AI researchers define how NodeZero’s agents should reason.…
Staff Attack Engineer (AI/LLM)
We are hiring a Staff Attack Engineer specializing in AI/LLM security to join our team. You will break AI and agentic systems and turn that research into automated attacks inside NodeZero, our autonomous pentesting…
Senior Software Engineer (Browser Automation)
We’re building an autonomous, black-box web application penetration tester It crawls and attacks real production websites the way a skilled human pentester would, finding broken access control, injection, XSS, and…
WebApp Offensive Security Software Engineer
We’re looking for a Webapp Offensive Security Engineer with deep, hands-on web application penetration testing experience to push our autonomous testing beyond what it can do today You’ll be testing real customer web…