Federal Platform Engineer

Horizon3.ai; United States; Hybrid; USD 150,000 - 190,000; Full time

Benefits offered by this job

Equity package

Health, vision & dental insurance

Flexible vacation policy

Parental leave

Job summary

Horizon3.ai is seeking a Federal Platform Engineer to lead deployment and operation of our production infrastructure across federal environments, from FedRAMP to Classified workloads. You will optimize platform reliability in AWS, enable scalable experimentation, and empower developers with automated tooling and secure CI/CD pipelines.

The role requires cloud-native expertise, Terraform/Crossplane, and Kubernetes, with a focus on automation, documentation, and secure, compliant operations.

Qualifications

• 5+ years of experience in DevOps/Platform engineering or related roles.
• Ability to manage concurrent initiatives and prioritize effectively.
• Strong problem-solving and analytical skills; excellent documentation.
• Experience with cloud-native platforms and automation tooling.
• US citizenship and ability to obtain Top Secret clearance.

Responsibilities

• Deploy and operate product infrastructure across federal environments (FedRAMP through Classified).
• Build, maintain, and improve scalable, secure platform running in AWS.
• Design tooling for telemetry and developer productivity (CI/CD, IaC).
• Create and maintain documentation culture (Confluence, docs-as-code).
• Lead Terraform modules and Crossplane compositions for engineering teams.
• Advance automation and infrastructure-as-code practices; evaluate new tech.

Skills

DevOps

Platform engineering

Cloud architecture

Automation

Documentation

Education

Bachelor’s in CS or STEM

MS in CS a plus

Tools

Terraform

Crossplane

Ansible

GitLab CI/CD

Argo CD/Workflows/Events

HashiCorp Vault

AWS

Kubernetes

Docker

Scripting (GoLang/Python)

Job description

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.

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.
Summary/Overview
We are looking for a Federal Platform Engineer to help lead the deployment and operation of our product infrastructure in multiple federal environments ranging from FedRAMP through Classified workloads. Your goal will be to help build, maintain and improve our platform running in AWS. Your expertise in cloud infrastructure, kubernetes, cloud infrastructure, and tools like Terraform, Ansible, and GitLab CI will be essential in creating scalable and secure systems that enable innovative experimentation. Join us in shaping the future of our platform, driving growth and empowering developers with a flexible and efficient environment.

Essential Functions

• Implement highly scalable, secure, resilient cloud-native application platforms that host core company applications, toolings, and other services vital to enabling our product to perform in all AWS regions where we are deployed.
• Identify, design, and deploy improvements in development and deployment processes so engineers can begin deploying anytime with confidence.
• Design and implement tooling for the internal platform to collect telemetry data used to gauge its effectiveness in supporting H3's engineers.
• Help create an effective documentation culture within the Engineering Organization (Confluence, Documentation as code).
• Participate in effective project management and work allocation (Jira, Agile Concepts).
• Create Terraform modules and Crossplane compositions that are easily consumed by all of engineering.
• Be a positive example of automation for infrastructure-as-code, platform operations, and overall CI/CD methodologies.
• Evaluate new technologies and patterns for automation, application hosting, and improving infrastructure provisioning. Recommend and define the work needed.
  

Competencies

• 5+ years of experience in DevOps, Platform engineering, or related roles.
• Ability to manage concurrent initiatives and use effective judgment in prioritization and time management.
• Creative, self-motivated, pragmatic, disciplined, detail and results oriented.
• Excellent analytical/problem solving ability.
• Strong understanding and experience with solution design and flow
• Strong technical documentation and communication
  

Tools

• Experience using Claude Code or other AI-enabled development tooling
• Gitlab CI/CD
• Argo Events, Argo Workflows, Argo CD
• SSO (OIDC, SAML, Okta, Social Sign-ins)
• Infrastructure as Code (Terraform, Crossplane)
• Secret Management (HashiCorp Vault, AWS Secret Manager, External Secrets Operator)
• Configuration Management (Ansible)
• Shell Scripting
• Programming Languages (GoLang required, Python a plus)
• Container Engines (Docker)
• Kubernetes (RKE2, K3S, EKS)
• Logging and Metrics (Datadog, OpenSearch)

Cloud Technologies
AWS Core Services

• Compute (EC2, Lambda, EKS)
• Storage (S3, EBS)
• Database (AuroraRDS - Postgres)
• Networking (VPC, VPCe, RT53)
• Event-Driven Architecture (SQS, EventBus)
• Security (IAM Roles and Policies, KMS, Cloudtrail)
• User Management (Cognito, Organizations, SSO)
  

Education

• Bachelors in Computer Science or STEM or equivalent experience
• MS in Computer Science a plus
  

Citizenship/Clearance

• US Citizen Required
• Possess or ability to gain and maintain Top Secret security clearance required
  

Nice to Haves
Experience in FedRAMP, CC SRG, NIST 800-53, or Authority to Operate (ATO) process.

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.

Why H3

• 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.
• Growth Opportunities: Be part of a dynamic and growing team with numerous career advancement opportunities.
• Innovation-Driven Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking.
• Hybrid & Remote Work: We embrace a mix of remote and hybrid work models depending on role and location, including our Chicago office, where some roles require regular in-office presence.
• Inclusive and Diverse Team: We value diversity and promote an inclusive culture where everyone can thrive.
  

Travel Required
We are a fully remote company, and this job may require up to 5% of travel to be successful. Job-related travel expenses are reviewed and must be approved by your manager.

Compensation Disclosure
In accordance with various State’s transparency regulations, we provide the following salary range information for this position:

• Base salary range: 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.

We are committed to pay equity, fairness, and transparency. All candidates will be evaluated based on their skills, experiences, and potential contributions without regard to race, gender, age, or any other protected status. Horizon3.ai is an equal opportunity employer and is committed to providing a work environment that is free from discrimination and harassment. We do not discriminate based on 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.

We encourage all qualified candidates to apply for open positions with our company and welcome candidates from all backgrounds and experiences. We are committed to providing equal employment opportunities to all employees and applicants for employment and will make reasonable accommodations to enable individuals with disabilities to perform the essential functions of their roles.

Join Horizon3.AI’s team of passionate professionals and contribute to the growth of cutting-edge cybersecurity solutions while building strong customer relationships in a dynamic and remote work environment.