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Salary: USD 199,750 - 270,000 / annual
Horizon3.ai is a fast-growing cybersecurity company building NodeZero, an autonomous penetration testing platform that helps organizations proactively identify and fix exploitable attack vectors at scale. The company serves organizations from educational institutions to Global 100 enterprises, with users including ITOps/SecOps teams, consulting pentesters, MSSPs, and MSPs.
You will join the Internal Platform Team as a Staff Platform Engineer, leading complex cross-team initiatives that shape the cloud and delivery foundations behind NodeZero. This is a hands-on technical leadership role focused on solving ambiguous problems and building reusable platform capabilities.
Key responsibilities include:
- 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 using Terraform and Crossplane
- Improve platform reliability, observability, security, performance, and operability
- Participate in on-call and incident response, leading post-incident improvements
- Drive high-impact initiatives across multiple teams, balancing 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, and Security
Success looks like: engineering teams moving faster through reliable platform capabilities and self-service workflows; shared services that are secure, observable, maintainable, and easier to operate; regional and ephemeral environments deploying consistently with less manual effort; platform consumers having clear interfaces, documentation, and support paths; and you being trusted to lead complex platform decisions and develop other engineers.
The platform stack includes AWS, Kubernetes and EKS, Terraform and Crossplane, GitLab CI/CD, OpenTelemetry and Datadog, Linux, containers, networking, IAM, and secrets-management systems, with Go and Python for automation and platform services.
Occasional travel may be required for company onsite meetings and team collaboration.
REQUIREMENTS:
- 8+ years in platform engineering, infrastructure engineering, SRE, DevOps, or software engineering with substantial production-platform ownership
- Deep experience designing and operating cloud platforms, preferably AWS
- Strong Kubernetes experience, including production operations, networking, reliability, and troubleshooting
- Strong infrastructure-as-code and automation experience with Terraform, Crossplane, or comparable tools
- Experience operating CI/CD and delivery infrastructure
- Strong understanding of IAM, secrets, networking, ingress, and least privilege
- Experience with distributed-systems observability and operational practices
- Proficiency in Go and Python for platform services, developer tooling, or automation
- Demonstrated success leading complex initiatives across multiple teams
- Excellent communication, mentoring, and technical-influence skills
PREFERRED QUALIFICATIONS:
- Multi-region or multi-environment SaaS platform experience
- Internal developer platform, declarative API, or Platform-as-a-Service experience
- GitLab CI/CD, self-hosted runners, OpenTelemetry, or Datadog experience
- Ephemeral-environment, automated-provisioning, or platform-lifecycle experience
- Security-sensitive, regulated, or cybersecurity experience
- Startup or high-growth company experience
