Senior/Staff Platform Engineer

The posting, as Horizon3 wrote it

Get to Know Us

Horizon3 is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find and 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 ITOps/SecOps teams, consulting pentesters, and MSSPs and MSPs.

We are a fusion of former U.S. Special Operations cyber operators, startup engineers, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools, 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.

ABOUT THE ROLE

We are looking for a Senior OR Staff Platform Engineer to join Horizon3’s Internal Platform Team (IPT) and shape the cloud and delivery foundations behind NodeZero.

You will lead complex, cross-team initiatives; define platform direction; improve developer workflows; and establish standards that make our systems secure, reliable, and easier to operate. This is a hands-on technical leadership role for an engineer who enjoys solving ambiguous problems and building reusable platform capabilities.

WHAT YOU’LL DO

PLATFORM STRATEGY, DELIVERY & OPERATIONS

• Lead the design and evolution of AWS, Kubernetes/EKS, and shared platform services.
• Define architecture for infrastructure automation, service delivery, regional capabilities, and ephemeral environments.
• Build reusable platform capabilities, self-service workflows, and release-safety practices.
• Evolve infrastructure-as-code and declarative approaches, including Terraform and Crossplane-related capabilities.
• Improve platform reliability, observability, security, performance, and operability.
• Participate in on-call and incident response, leading post-incident improvements.

TECHNICAL LEADERSHIP & COLLABORATION

• Drive high-impact initiatives across multiple teams and balance reliability, security, cost, developer experience, and delivery speed.
• Establish platform standards, reduce technical debt, and guide design decisions.
• Partner with feature teams to turn platform needs into durable solutions.
• Mentor engineers and raise the technical bar across Engineering.
• Improve documentation, runbooks, interfaces, and self-service paths.
• Communicate clearly and build alignment across Platform, Application Engineering, Data Engineering, Product, Program Management, a

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following salary range information for this position:

• Base salary range: $199,750 - $270,000 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.

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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