
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.
🔥 12 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 12 hours ago
Still open on Horizon3.ai's site. Checked 3 hours 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.
• Build services that determine customer purchases, enabled capabilities, and applicable usage limits • Design, build, and maintain services and APIs representing customer purchases, product packaging, capabilities, and usage limits • Own features from technical design through implementation, testing, rollout, and production operation • Build and evolve entitlement and usage workflows across direct and MSP/MSPP account models • Partner with Product and adjacent engineering teams to define interfaces and resolve licensing, packaging, and feature-access edge cases • Improve tests, observability, design documentation, runbooks, and support playbooks for business-critical services • Investigate production issues across service boundaries and implement durable fixes • Review code and design proposals and share context with other engineers
• Bachelor’s degree in Computer Science, Computer Engineering, or a related field, or equivalent practical experience • 7+ years of professional software engineering experience building and operating backend software • Experience with a modern backend language such as Python, Go, Java, or TypeScript • Experience designing APIs and data models for business-critical services or customer-facing workflows • Strong SQL and relational database experience, including data integrity and production troubleshooting • Experience with cloud-hosted services and containerized applications such as Docker • Familiarity with Kubernetes or a comparable orchestrator • Strong foundation in testing, observability, and ownership of production services • Strong ownership and judgment when working on customer-impacting workflows where correctness matters • Ability to reason through edge cases and communicate implementation risks and tradeoffs clearly • Quality-minded approach to testing, data integrity, production support, and technical documentation • Effective collaboration with Product and engineering partners; willingness to share knowledge and support teammates • Ability to manage concurrent work while keeping stakeholders informed • Experience with licensing, entitlements, subscriptions, usage metering, billing-adjacent workflows, or feature access controls • Experience with multi-tenant SaaS, account hierarchies, RBAC, or partner account models • Experience with Python or Go, PostgreSQL, GraphQL, AWS, and event-driven or distributed systems • Familiarity with Kafka or other event-streaming systems, workflow tools such as Temporal or Prefect, and production observability platforms • May require up to 5% travel
• Equity package in the form of stock options for all full-time roles • Career development opportunities • Collaborative environment encouraging creativity and out-of-the-box thinking • Health, vision, and dental insurance for you and your family • Flexible vacation policy • Generous parental leave • Remote and hybrid work models depending on role and location • Inclusive culture and equal opportunity workplace
Apply NowImprove your chances of getting an interview by checking your resume score before you apply.
🔥 14 hours ago
Boomi Integration Architect designing governed enterprise integrations for Argano’s digital consultancy. Leading Boomi architecture, APIs, data transformation, security, and delivery across US and Canadian remote teams.
🔥 14 hours ago
Senior Clinical Data Programmer modernizing regulated clinical trial data workflows with Python at Clario. Building scalable automation and CDISC SDTM-aligned data solutions.
🇺🇸 United States – Remote
💰 Private Equity Round on 2019-10
⏰ Full Time
🟠 Senior
🔙 Backend Engineer
🦅 H1B Visa Sponsor
🔥 15 hours ago
Senior backend engineer building Affirm’s governed AI platform. Designing gateways, runtimes, and distributed systems powering financial products at scale.
🇺🇸 United States – Remote
💵 $173k - $233k / year
💰 Post-IPO Equity on 2021-01
⏰ Full Time
🟠 Senior
🔙 Backend Engineer
🦅 H1B Visa Sponsor
🔥 16 hours ago
Senior Backend Developer building Java-based data processing, compliance tools, and distributed systems. Contributing to Sumsub’s AI-powered identity verification and fraud prevention platform.
🔥 16 hours ago
Senior Staff Engineer architecting Affirm’s EKS compute platform for scalable financial products. Driving Kubernetes reliability, automation, workload safety, observability, and cost optimization.
🇺🇸 United States – Remote
💵 $236k - $296k / year
💰 Post-IPO Equity on 2021-01
⏰ Full Time
🟠 Senior
🔙 Backend Engineer
🦅 H1B Visa Sponsor