Get to Know Us
Horizon3.ai is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find, fix and verify exploitable attack vectors before criminals exploit them. Our flagship product, the NodeZero™ 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 IT Ops/SecOps teams, consulting pentesters, and MSSPs and MSPs.
We are a fusion of former U.S. Special Operations cyber operators, startup engineers & operators, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools and 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.
As a remote first company, we require minimum 25Mbps consumer grade broadband connection.
What You'll Do
You will lead Client Platform — the team responsible for the software that lives in customer environments and makes NodeZero's autonomous pentests possible. Client Platform owns two sub-teams: Image Build & Release (the factory that produces and signs the NodeZero runner container image) and OTA Services (the system that keeps runners current across thousands of customer environments). Every pentest NodeZero runs depends on this team's work being reliable, secure, and fast.
Team Building & Culture: Build, mentor, and grow Client Platform to ~10 engineers across Image Build & Release and OTA Services. You will directly manage the Engineering Managers of both sub-teams and set the technical and cultural direction for the full org. Establish engineering norms and a culture of ownership for a team whose software runs in environments you cannot control.
Image Build & Release: Lead end-to-end CI/CD workflows to create, sign, and reliably publish the NodeZero runner container image. Own software supply chain security: reproducible builds, image signing, SBOM generation, and vulnerability scanning in CI.
OTA Services: Architect and operate the over-the-air update delivery system that keeps NodeZero runners current across thousands of customer environments — reliably, securely, and without requiring manual customer IT intervention.
Security Research Partnership: Collaborate closely with Security Research to ensure the runner seamlessly executes new autonomous pentest capabilities as they ship.
Act as a Product Owner: Partner with product managers, security researchers, and customer success to manage the client-side roadmap.
What You'll Bring
Platform Leadership & Architecture
Demonstrated expertise leading teams that design, build, and operate containerized software (Docker, VM images) deployed into on-premise or customer-managed environments.
Experience implementing robust software supply chain practices — secure builds, image signing (cosign, Notary), reproducible builds, and vulnerability scanning in CI.
Experience designing and operating OTA update mechanisms for distributed agents or edge software at scale — including staged rollouts, rollback, and delivery verification.
Ability to reason about correctness in opaque, customer-controlled environments where you cannot observe failure modes directly.
Team Building & Engineering Culture
Experience building or significantly growing an engineering team — including hiring, onboarding, and establishing engineering norms tailored for shipped software.
Proven ability to define and instill engineering culture: rigorous code review standards, robust testing across diverse customer environments, and a strong culture of ownership.
Drives high-impact architecture decisions rigorously — requires design documents, runs structured reviews, builds consensus, and ensures decisions account for customer environment variables.
Technical Expertise
Proficient in Go (preferred), Python, or C++.
Strong Linux OS-level operations: container runtimes, networking in corporate environments, systemd, process isolation.
Experience with CI/CD pipelines for building and signing container images (cosign, Notary v2, or equivalent).
Familiarity with OTA update protocols and frameworks: TUF (The Update Framework), Omaha, or custom mechanisms.
Understanding of TLS, certificate pinning, and secure software delivery in hostile network environments.
Nice to Haves
Exposure to cybersecurity, pentesting tools, or vulnerability remediation.
Experience with cross-platform agents (Windows/Linux) and endpoint telemetry.
Background in software running in air-gapped or restricted network environments.
Familiarity with SLSA supply chain security framework.
Travel Required
We are a fully remote company, and this job may require up to 5% of travel to be successful.
Compensation and Values
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: $242,250 - $275,000 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
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
Horizon3 is not just an equal opportunity employer - we are a community that values diversity, equity, and inclusion as fundamental principles of our culture and success. We are dedicated to fostering a workplace where everyone feels welcome and respected, regardless of race, color, religion, sex, national origin, age, disability, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, or any other legally protected status by law.
Our commitment to diversity and inclusion means we strive to attract, develop, and retain a workforce that reflects the varied communities we serve. We believe that diverse perspectives drive innovation and strengthen our ability to create cutting-edge cybersecurity solutions. At Horizon3, every team member is valued and supported in an environment that encourages personal and professional growth.
We welcome candidates from all backgrounds and experiences, and we encourage all qualified individuals to apply. Come be a part of Horizon3, where your unique contributions are recognized, and your potential is limitless.
Other Duties
Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee. Duties, responsibilities, and activities may change at any time with or without notice.
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.
Skills Required
- Experience leading teams that design, build, and operate containerized software deployed in on-premise or customer-managed environments
- Experience implementing secure software supply chain practices, including secure builds, image signing, reproducible builds, SBOM generation, and vulnerability scanning
- Experience designing and operating over-the-air update mechanisms for distributed agents or edge software at scale
- Ability to reason about software correctness in opaque, customer-controlled environments
- Experience building or significantly growing an engineering team, including hiring and onboarding
- Experience establishing engineering norms, code review standards, robust testing, and a culture of ownership
- Ability to drive architecture decisions through design documents, structured reviews, and consensus building
- Proficiency in Go, Python, or C++
- Strong Linux operating system experience, including container runtimes, networking, systemd, and process isolation
- Experience with CI/CD pipelines for building and signing container images
- Familiarity with OTA update protocols or frameworks such as TUF, Omaha, or custom mechanisms
- Understanding of TLS, certificate pinning, and secure software delivery in hostile network environments
- Exposure to cybersecurity, penetration testing tools, or vulnerability remediation
- Experience with cross-platform Windows/Linux agents and endpoint telemetry
- Experience with software running in air-gapped or restricted network environments
- Familiarity with the SLSA software supply chain security framework
Horizon3.ai Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Horizon3.ai and has not been reviewed or approved by Horizon3.ai.
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Fair & Transparent Compensation — Pay is considered competitive across key roles, with employer language and role ranges positioning compensation as market-aligned. Feedback suggests compensation is viewed favorably, particularly in technical positions.
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Equity Value & Accessibility — Equity is positioned as a core part of total rewards, with stock options broadly available to full-time employees. Feedback suggests equity and related programs enhance overall compensation.
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Leave & Time Off Breadth — Time off is described as at least four weeks plus generous holidays and vacation packages globally. Feedback suggests this breadth of leave contributes to positive perceptions of total rewards.
Horizon3.ai Insights
What We Do
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. Like APTs, ransomware, and other threat actors, our algorithms discover and fingerprint your attack surface, identifying the ways exploitable vulnerabilities, misconfigurations, harvested credentials, and dangerous product defaults can be chained together to facilitate a compromise. NodeZero is a true self-service SaaS offering that is safe to run in production and requires no persistent or credentialed agents. You will see your enterprise through the eyes of the attacker, identify your ineffective security controls, and ensure your limited resources are spent fixing problems that can actually be exploited. Founded in 2019 by industry, US Special Operations, and US National Security veterans, Horizon3.ai is headquartered in San Francisco, CA, and made in the USA.
