[Remote] Senior Engineering Manager, Core Platform

Note: The job is a remote job and is open to candidates in USA. Horizon3.ai is a fast-growing, remote cybersecurity company focused on enabling organizations to proactively identify and mitigate exploitable attack vectors. The Senior Engineering Manager will lead the Core Platform organization, ensuring the reliability, scalability, and performance of the backend systems that support the NodeZero platform. Responsibilities • Lead our Core Platform organization, a high-impact team that underpins NodeZero’s reliability, scalability, and core backend systems • Drive excellence in backend infrastructure, data pipelines, observability, and API performance • Own and accelerate our platform architecture and infrastructure, enabling engineering teams and on-call responders to deliver, operate, and recover quickly as we scale securely and sustainably Skills • Proven experience leading highly technical backend or platform engineering teams — ideally within a SaaS, cybersecurity, or cloud-scale environment • Deep understanding of scalable backend architecture, database optimization, and distributed systems • Experience with data pipelines and ETL systems • Experience with observability tooling and platform monitoring • Strong grasp of cloud infrastructure concepts (AWS, GCP, Azure), DevOps, and resilience engineering principles • Demonstrated success building and managing teams that support core platform reliability and internal developer platforms • Ability to balance technical depth with strategic foresight — looking ahead to align infrastructure investments with business priorities • Excellent communicator and collaborator, comfortable working cross-functionally and aligning diverse stakeholders • Comfortable operating without a dedicated product manager — able to help define direction, set technical priorities, and contribute to roadmapping • Strong background in backend engineering and/or platform engineering, with deep experience in designing, scaling, and maintaining distributed systems • Expertise in at least one object-oriented programming language (Python strongly preferred; open to Go, Java, C++, or similar) • Familiarity with ETL pipelines, data flow orchestration, and database performance optimization (PostgreSQL, Neo4j, or equivalent) • Solid understanding of cloud infrastructure and services (AWS, Azure, or GCP), including networking, compute, and storage fundamentals • Exposure to infrastructure-as-code and deployment concepts (e.g., Terraform, Docker, Kubernetes, CI/CD tooling) • Experience with observability and monitoring stacks (Prometheus, Grafana, OpenTelemetry, etc.) • Understanding of security and reliability best practices, especially in a multi-tenant SaaS or cybersecurity environment • Knowledge of Linux-based systems (Ubuntu, Kali, etc.) and modern development practices for distributed environments • Bachelor's or Master's degree preferred Benefits • Health, vision & dental insurance for you and your family • Flexible vacation policy • Generous parental leave Company Overview • Horizon3.ai offers an autonomous penetration testing platform that helps organizations proactively find and fix security vulnerabilities. It was founded in 2019, and is headquartered in San Francisco, California, USA, with a workforce of 201-500 employees. Its website is Apply tot his job