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Salary: USD 199,750 - 230,000 / annual
Horizon3.ai is a fast-growing cybersecurity company building NodeZero, an autonomous penetration testing platform used by IT Ops/SecOps teams, consulting pentesters, and managed service providers. The platform delivers production-safe autonomous pentests and security assessments that scale across internal, external, cloud, and hybrid cloud environments, serving organizations from educational institutions to Global 100 enterprises.
The Federal Platform Engineer role focuses on designing, building, and operating cloud infrastructure to support NodeZero deployments in federal environments, ranging from FedRAMP through classified workloads. You will lead the deployment and operation of the product infrastructure across multiple AWS regions and federal compliance contexts.
Key responsibilities include:
- Implement highly scalable, secure, and resilient cloud-native application platforms hosting core company applications and services across all AWS regions where deployed
- Identify, design, and deploy improvements to development and deployment processes, enabling engineers to deploy with confidence
- Design and implement telemetry tooling to measure platform effectiveness in supporting engineering teams
- Create and maintain effective documentation culture using Confluence and documentation-as-code practices
- Participate in project management and work allocation using Jira and Agile methodologies
- Develop Terraform modules and Crossplane compositions for easy consumption by engineering teams
- Model automation best practices for infrastructure-as-code, platform operations, and CI/CD methodologies
- Evaluate emerging technologies and patterns for automation and infrastructure provisioning
The company is a fusion of former U.S. Special Operations cyber operators, startup engineers, and cybersecurity practitioners committed to solving ineffective security tools, alert fatigue, blind spots, and the cybersecurity skills shortage.
The role is fully remote with up to 5% travel required. US citizenship and the ability to obtain and maintain a Top Secret security clearance are required.
Requirements:
- 5+ years of experience in DevOps, Platform Engineering, or related roles
- Bachelor's degree in Computer Science, STEM, or equivalent experience (Master's in Computer Science a plus)
- US Citizen with ability to obtain and maintain Top Secret security clearance
- Strong experience with: GitLab CI/CD, Kubernetes (RKE2, K3S, EKS), Terraform, Ansible, Docker, GoLang (required), Python (preferred)
- Experience with Argo Events, Argo Workflows, Argo CD
- AWS expertise: EC2, Lambda, EKS, S3, EBS, Aurora RDS (Postgres), VPC, Route 53, SQS, EventBus, IAM, KMS, CloudTrail, Cognito
- Secret management tools: HashiCorp Vault, AWS Secrets Manager, External Secrets Operator
- SSO implementation: OIDC, SAML, Okta
- Logging and metrics: Datadog, OpenSearch
- Shell scripting and configuration management
- Ability to manage concurrent initiatives with strong prioritization and time management
- Excellent analytical and problem-solving skills
- Strong technical documentation and communication abilities
- Experience with AI-enabled development tooling (Claude Code or similar)
Nice to have:
- Experience with FedRAMP, CC SRG, NIST 800-53, or Authority to Operate (ATO) processes
