Horizon3 uses real-world attacks to safely show what attackers can actually do in your environment—so you can fix and prove what matters. Backed by NEA.
About the role
Research and reproduce high-consequence vulnerabilities across enterprise networks, applications, identity systems, cloud environments, and infrastructure—including CISA KEVs, CVEs, N-Days, and Zero-Days. Study attacker tactics, techniques, procedures, and campaigns observed in the wild, including tradecraft not tied to a single CVE. Found on 1752vc Careers, the job board for startup and VC roles.
What they're looking for
- Strong Python and software engineering skills, including experience building, testing, and operating production-quality tooling
- Solid penetration testing, vulnerability research, and exploit-development fundamentals
- Hands-on experience with enterprise networks, applications, identity systems, cloud environments, or endpoint security
- Demonstrated ability to reproduce vulnerabilities and convert manual techniques into reliable automation
- Understanding of common attack chains, trust boundaries, authentication and authorization, privilege escalation, and lateral movement
- Ability to balance speed, safety, reliability, coverage, and actionable evidence
More about this role
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 them. Our flagship product, the NodeZeroTM platform, delivers production-safe autonomous pentests and other key assessment operations that scale across the largest internal, external, cloud, and hybrid cloud environments. NodeZero has been adopted by organizations of all sizes, from small educational institutions to government agencies and Global 100 enterprises. It is used by ITOps/SecOps teams, consulting pentesters, and MSSPs and MSPs.
We are a fusion of former U.S. Special Operations cyber operators, startup engineers, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools, false positives resulting in alert fatigue, blind spots, "checkbox” security culture, cybersecurity skills shortage, and the long lead time and expense of hiring outside consultants. Collectively, we are a team of learn it alls, committed to a culture of respect, collaboration, ownership, and results.
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