Staff Defensive Security Software Engineer

🕒 July 28

🇺🇸 United States – Remote

💵 $240k - $270k / year

⏰ Full Time

🔴 Lead

🧑‍💻 Full-stack Engineer

👻 Ghost score 21%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Horizon3.ai

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2019

🔒 Cybersecurity

🤖 Artificial Intelligence

☁️ SaaS

Cybersecurity • Artificial Intelligence • SaaS

Horizon3. ai is a cybersecurity company that specializes in autonomous penetration testing through its platform, NodeZero. The company's mission is to proactively identify and address attack vectors before they can be exploited, allowing organizations to continuously assess their security posture across various environments including cloud, IoT, and on-premises systems. Founded by veterans from the US Special Operations and National Security sectors, Horizon3. ai offers a self-service SaaS solution that provides organizations with insights into their security vulnerabilities without requiring persistent or credentialed agents.

📋 Description

• Combine deep security domain expertise with hands-on full-stack development to design, prototype, and ship new security capabilities within NodeZero • Partner with product managers and designers to identify high-impact opportunities • Collaborate with product engineers to quickly turn ideas into MVPs and production features • Focus on honeytoken and honeypot creation, deployment, and detection logic for Tripwires and adjacent products like Rapid Response

🎯 Requirements

• Expert-level proficiency in large-scale Python software development • Deep experience with network security topics such as reconnaissance and lateral movement • Proficiency with Active Directory, Windows authentication, and other windows internals • Strong understanding of network protocols such as SMB and WMI • Experience with relational (Postgres) or graph (Neo4j) database systems • Minimum of 4 years of experience in building offensive or defensive security solutions • Bachelor's Degree in Computer Science, Computer Engineering or related field • OSCP, GCWN or equivalent certifications

🏖️ Benefits

• Health insurance • Vision care • Dental care • Flexible vacation policy • Generous parental leave