horizon3ai - Staff Defensive Security Software Engineer
Requirements
• Technical Leadership: Owns the end-to-end technical vision for the workstream and rallies the team around it — from blank doc through shipping, iterating, and deprecating. • Software Engineering: Production code contributions at Lead/Staff level in a modern backend language (Go, Rust, Python, or similar) in a service-oriented environment. • Self-Motivation: The ability to work independently with minimal supervision, demonstrating initiative and a high level of energy. • Collaboration: Work closely with other cross-functional partners to build and improve our product portfolio • Communication: Strong technical writing and documentation skills, with the ability to convey findings and methodologies to both technical and non-technical stakeholders. • Technical Design: Proficiency in designing, presenting, and evaluating technical solutions, ensuring high-quality software and secure development practices. • Team Leadership: • Sets and raises the technical bar (design reviews, code quality, operational discipline) by example rather than by mandate. • Mentors and enhances the engineers around them; Build the frameworks and architecture for others to do the best work of their careers. • Holds the team accountable to outcomes rather than activity; surfaces risks and tradeoffs early and in writing. • Product-Minded Technical Leadership: • Translates ambiguous product goals into concrete technical roadmaps. • Partners closely with PM — comfortable in PRD reviews, not just sprint planning. • Sequences an MVP without painting the team into a corner. • Python: Expert-level proficiency in large-scale Python software development. • Network Security: Deep experience with network security topics such as reconnaissance and lateral movement. • Windows Experience: Proficiency with Active Directory, Windows authentication, and other windows internals • Network Protocols: Strong understanding of network protocols such as SMB and WMI and their intricacies, including their role in exploitation vectors. • Database Experience: Experience with relational (Postgres) or graph (Neo4j) database systems. • Security Experience: Minimum of 4 years of experience in building offensive or defensive security solutions, ideally in endpoint, threat detection, or low-level systems. • Education: Bachelor's Degree in Computer Science, Computer Engineering or related field. • Equivalent experience may be considered if demonstrable through proof-of-concept write-ups, published vulnerability research, or similar achievements. • OSCP (Offensive Security Certified Professional), GCWN (GIAC Certified Windows Security Administrator) or equivalent certifications. • Previous experience in red teaming or penetration testing, incident response, detection engineering, deception technologies, or other deeply technical roles with relevant skill sets. • Previous experience working on large-scale software projects. • Experience administering, attacking, or defending cloud environments. • Knowledge of and experience with Docker and containerization technologies. • Familiarity with identity and directory services such as Active Directory, Entra ID, or Okta. • Familiarity with cloud authentication and authorization technologies such as Azure Service Principals or AWS IAM. • We are a fully remote company, and this job may require up to 5% of travel to be successful.
Responsibilities
• As a Security Engineer on the Tripwires team, you'll combine deep security domain expertise with hands-on full-stack development to design, prototype, and ship new security capabilities within NodeZero. You'll partner with product managers and designers to identify high-impact opportunities, and work alongside product engineers to quickly turn those ideas into MVPs and production features. Day-to-day work spans product research, threat-informed design, and feature development — with a particular focus on honeytoken and honeypot creation, deployment, and detection logic for Tripwires and adjacent products like Rapid Response. By building these capabilities, you'll deepen customer engagement with our platform and deliver novel solutions that measurably improve their security posture. • Application Note: • In any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information.
Benefits
• At Horizon3, we believe that our people are our greatest asset, and our compensation philosophy reflects this core value. We are committed to fostering an environment where all employees feel valued, respected, and rewarded for their contributions. Our compensation structure is designed to be fair, competitive, and transparent, ensuring that every team member is recognized and compensated equitably across roles, levels, and locations. • In accordance with various State’s transparency regulations, we provide the following salary range information for this position: • Base salary range: $240,000 - $270,000 annually. The exact salary will be determined based on the selected candidate’s location, qualifications, experience, and relevant skills. • Additional compensation: This role may also be eligible for an equity package (in the form of stock options). If any other compensation benefits apply, they will be discussed during the interview process. • Perks of Horizon3.ai http://Horizon3.ai: • Inclusive Team: We value diversity and promote an inclusive culture where everyone can thrive. • Growth Opportunities: Be part of a dynamic and growing team with numerous career development opportunities. • Innovative Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking. • Remote Work: We are a 100% remote company. Enjoy the flexibility to work in the way that supports you and brings out your best. • Competitive Compensation: We offer competitive salary and benefits which includes health, vision & dental care for you and your family, a flexible vacation policy, and generous parental leave. • You Belong Here:
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