Staff Defensive Security Software Engineer

Horizon3.ai

Staff Defensive Security Software Engineer focused on developing deception capabilities within NodeZero for cybersecurity solutions. Collaborating across teams to enhance detection and response reliability.

Posted 7/28/2026full-timeRemote • 🇺🇸 United StatesLead💰 $240,000 - $270,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expert-level proficiency in Python software development and a strong understanding of network security, including reconnaissance and lateral movement. Capable of designing and deploying security solutions while collaborating effectively with cross-functional teams.

Highest-signal resume keywords

Expert-Level Python Software DevelopmentNetwork Security ExpertiseActive Directory ProficiencyRelational Database ExperienceOSCP Certification

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Python Software DevelopmentNetwork SecurityWindows AuthenticationNetwork ProtocolsPostgres DatabaseNeo4j DatabaseHoneypot CreationHoneytoken DeploymentDetection LogicOffensive Security Solutions

Soft Skills

CollaborationCommunicationProblem-Solving

Certifications & Qualifications

OSCPGCWN

Industry Keywords

ReconnaissanceLateral MovementMVP DevelopmentSecurity CapabilitiesTripwires

Tech Stack

Tools & technologies

Neo4jPostgresPython

About the role

Key responsibilities & impact

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

What you’ll need

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

Comp & perks

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