
Horizon3.ai's mission is to help you find and fix attack vectors before attackers can exploit them. NodeZero, our autonomous penetration testing solution, enables organizations to continuously assess the security posture of their enterprise, including external, identity, on-prem, IoT, and cloud attack surfaces.
51 - 200 employees
Founded 2019
November 21
🇺🇸 United States – Remote
đź’µ $195k - $242k / year
⏰ Full Time
đźź Senior
👷🏻‍♀️ Engineer

Horizon3.ai's mission is to help you find and fix attack vectors before attackers can exploit them. NodeZero, our autonomous penetration testing solution, enables organizations to continuously assess the security posture of their enterprise, including external, identity, on-prem, IoT, and cloud attack surfaces.
51 - 200 employees
Founded 2019
• Conduct comprehensive threat modeling and risk assessments • Design and execute end-to-end, objective-based red team operations • Perform deep, security-focused source code reviews • Lead comprehensive security configuration audits of cloud environments • Assess and test the security of CI/CD pipelines • Conduct in-depth penetration tests against critical web applications • Actively collaborate with engineering and defensive teams in purple team exercises • Develop custom tooling, exploits, and automation scripts as required • Stay abreast of the latest threat intelligence, vulnerabilities, and exploits • Investigate, own, and report on vulnerabilities, exploit paths, and their business impact
• 5+ years of hands-on experience in offensive security • Proven ability to read, review, and identify vulnerabilities in source code (especially Python and JavaScript) • Deep, practical experience attacking and auditing cloud environments (e.g., AWS, GCP, Azure) • Must hold one or more advanced, industry-recognized offensive security certifications: OSCP, OSWE, OSCE, CRTO, or GIAC (GCPN, GXPN) • Expert-level knowledge of modern web application security, including the OWASP Top 10, API security, and common framework vulnerabilities • Strong proficiency in common offensive security tools (e.g., Burp Suite, Nmap) and C2 frameworks (e.g., Cobalt Strike, Sliver, Brute Ratel) • Strong written and verbal communication
• Health insurance • Vision insurance • Dental insurance • Flexible vacation policy • Generous parental leave • Stock options
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