
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.
🔥 16 hours ago
🇺🇸 United States – Remote
💵 $199k - $235k / year
⏰ Full Time
🟠 Senior
🔙 Backend Engineer
👻 Ghost score 20%
Where this job comes from
Posted on Horizon3.ai's careers page, not through a job board
First seen by Remote Rocketship 16 hours ago
Still open on Horizon3.ai's site. Checked 46 minutes ago.

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.
• Design, build, and operate backend services and APIs for user access, account hierarchies, settings, and administration workflows • Own features from design and implementation through tests, safe rollout, observability, and production support • Apply secure authorization and data-modeling practices to customer and parent-child account relationships • Investigate production issues and improve service reliability, performance, and observability • Write and review maintainable code, automated tests, design documentation, runbooks, and support guidance • Partner with Product, frontend engineers, and adjacent platform teams to deliver cohesive customer workflows • Mentor teammates through design discussions, code reviews, and collaborative problem solving • Travel up to 5% may be required
• Bachelor’s degree in Computer Science, Computer Engineering, or a related field, or equivalent practical experience • 7+ years of professional software engineering experience building production software with a modern programming language • Experience designing and operating backend services and APIs and taking complex work from design through production • Strong SQL and relational database experience, including data modeling and debugging or improving queries • Experience building services on AWS, GCP, or Azure • Experience with Docker or other containerized applications • Demonstrated focus on testing, production reliability, observability, and clear technical communication • Ability to own complex work end to end, manage competing priorities, and communicate risks and tradeoffs early • Customer- and security-conscious approach to administration and access workflows • Strong analytical and problem-solving skills and attention to detail • Clear technical writing and effective collaboration with Product and engineering partners • Experience with multi-tenant SaaS, RBAC, SSO, audit logs, delegated administration, or account hierarchy models is advantageous • Experience with Python or Go, PostgreSQL, GraphQL, Kubernetes, and CI/CD is advantageous • Familiarity with feature flags, metrics, tracing, alerting, Datadog, Prometheus, or OpenTelemetry is advantageous • Experience in cybersecurity or building customer-facing platform capabilities is advantageous • Must be legally authorized to work in the United States
• Equity package in the form of stock options for all full-time roles • Health, vision & dental insurance for you and your family • Flexible vacation policy • Generous parental leave • Career development opportunities • Inclusive and collaborative culture • Remote work
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