Senior Engineering Manager, Core Platform

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 NodeZeroTM 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

We’re looking for a Senior Engineering Manager to lead our Core Platform organization — a high-impact team that underpins NodeZero’s reliability, scalability, and core backend systems.

This is a technical leadership role focused on driving excellence in backend infrastructure, data pipelines, observability, and API performance. The Platform Stability team’s customers are other Horizon3.ai engineering teams, and your mission is to ensure the foundation they build on is fast, resilient, and scalable.

You’ll 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.

This is an ideal opportunity for someone who loves solving great data and scalability problems — a highly technical manager who has moved beyond hands-on coding into leadership, but still brings a deep understanding of distributed systems and platform engineering.

What You’ll Bring

• 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.

• Background in software engineering, computer science, or related technical field; Bachelor’s or Master’s degree preferred.

Required Tech Stack Experience

• 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.

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: $210,000 - $260,000 annually. The exact salary will be determined based on the selected candidate’s location, qualifications, experience, and relevant skills.

• Additional compensation: All full-time roles are eligible for an equity package in the form of stock options.

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, equity and benefits. Our benefits include health, vision & dental insurance 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

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