--- title: 'Federal Platform Engineer at Horizon3 AI' canonical: 'https://feeny.ai/job/federal-platform-engineer-horizon3-ai-united-states-02sksrxv1sc8' type: 'job' last_seen: '2026-09-12' --- # Federal Platform Engineer at Horizon3 AI - **Company:** [Horizon3 AI](https://feeny.ai/companies/horizon3-ai) - **Location:** United States - **Employment:** full-time - **Work type:** remote - **Posted:** 2026-05-28 - **Last confirmed live:** 2026-09-12 - **Apply:** https://jobs.ashbyhq.com/horizon3ai/6adf23b2-8678-4465-aa73-626238a14049 ## Job description Get to Know Us [Horizon3](http://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](http://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](http://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. ## About Horizon3 AI ## Company Overview - **One-liner**: Horizon3.ai provides an autonomous penetration testing platform (NodeZero) that safely hacks production environments to identify and fix exploitable attack paths using AI. - **Entity Type**: Private (Series D – latest funding round in 2026, led by Prosperity7 Ventures) - **Headquarters**: San Francisco, California, United States (447 Battery Street, San Francisco, CA 94111) - **Founded**: 2019 - **Founders**: Snehal Antani (Co-Founder & CEO); founded by a mix of US Special Operations, US National Security, and cybersecurity industry veterans ## Core Business - **Primary industry**: Cybersecurity (autonomous penetration testing, vulnerability management, continuous security validation) - **Target customers**: B2B – large enterprises, Fortune 100, government agencies (NSA, CISA), healthcare providers, financial services, manufacturing, education, public sector - **Mission**: “Turn the map around” – using the attacker’s perspective to help enterprises prioritize defensive efforts. The company aims to shift the advantage from attackers to defenders by fighting AI with AI. ## Products & Services - **[NodeZero®](https://horizon3.ai/)**: Autonomous penetration testing SaaS platform. Safely runs real attack techniques in production environments (no agents, no disruption). Discovers and chains exploitable vulnerabilities, misconfigurations, harvested credentials, and dangerous defaults across external, identity, on-prem, cloud, and Kubernetes attack surfaces. Also includes Active Directory password auditing and phishing impact testing. Continuously validates fixes and repeats autonomously. ## Market Standing - **Valuation**: Not publicly disclosed - **Key Metrics**: - Annual Revenue: **$35.5M** (per LinkedIn) - Total Funding: **$187M** (per LinkedIn) / **$181M** (per CB Insights – conflicting reports; both cited) - **225,000+** production-safe tests completed - **5,000+** customers - **Notable Investors/Partners**: - SignalFire (lead in Seed, Series A, Series B) - Craft Ventures (lead Series C) - Prosperity7 Ventures (lead Series D – 2026) - **Growth Signals**: - Ranked **#1 in Security** on the 2025 Inc. 5000 list - **#3 overall** on the 2025 Deloitte Technology Fast 500 - Fast Company’s **Most Innovative Companies** (2026) – #1 in Security - Named to the **Fortune Cyber 60** (2023 & 2025) - Two-time **Black Unicorn Award** winner - Headcount grew **115.5% YoY** to 341 employees (LinkedIn) - Active job postings up **168.2% YoY**; operates in 14 countries ## Competitive Advantages - **AI-driven autonomous testing** that learns from hundreds of thousands of tests and uses the right AI (ML, GenAI) for each problem – delivers evidence-based results with **zero hallucinations**. - **Production-safe** – zero downtime across all production tests, trusted by the world’s most sensitive high-security environments (NSA, CISA, Fortune 10, major healthcare). - **No agents required** – fully self-service SaaS, safe to run continuously. - **Real attack techniques** – not a scanner; shows actual attacker paths and impact. - **Rapid verification** – instantly confirms fixes and repeats the cycle, enabling a continuous validation loop. ## Strategic Focus - **Continuous validation** – driving a loop of test-fix-verify-repeat autonomously. - **Fighting AI with AI** – building NodeZero to operate at machine speed against AI-powered attacks. - **Global expansion** – already in 14 countries, with active hiring in EMEA, APAC, and the Americas. - **Scaling the team** – 59 active job postings (as of mid-2026), with emphasis on engineering, sales, and customer success roles. ## Why Work Here - **Culture**: Rated **5.0/5.0 on LinkedIn** (76 reviews) with perfect scores for Culture (5.0), Career (4.9), Compensation (4.7), and Work-Life (4.6). Described as a “kick-ass organization hell bent on disrupting an industry” with a team of “motivated learn-it-alls.” - **Work Policy**: Remote-friendly (most roles listed as remote, HQ in San Francisco, CA). Offers flexibility across time zones. - **Notable Perks** (from Built In and LinkedIn): - Comprehensive healthcare (medical, dental, vision, FSA) - Life insurance, disability insurance - 401(k) with company matching - Equity and employee stock purchase plan - Generous parental leave and family medical leave - Performance bonuses - Job training, conferences, and customized development tracks - Promotion policies and career growth support - **Engineering Culture**: Built by US Special Operations and National Security veterans. Emphasis on high autonomy, real-world impact, and cutting-edge AI/security work. “If you want to be part of a kick-ass organization hell bent on disrupting an industry and keeping attackers at bay, let’s talk.” ## Sources 1. [horizon3.ai – Homepage](https://horizon3.ai/) 2. [horizon3.ai – About/Team](https://horizon3.ai/about-us/) 3. [LinkedIn – Horizon3.ai Company Page](https://www.linkedin.com/company/horizon3ai) 4. [Built In – Horizon3.ai Careers & Perks](https://builtin.com/company/horizon3ai) 5. [CB Insights – Horizon3.ai Profile](https://www.cbinsights.com/company/horizon-3-ai) ## Other roles at Horizon3 AI - [Account Executive, MSP (East)](https://feeny.ai/job/account-executive-msp-east-horizon3-ai-east-q4w5atyf2a5p) — East - [Senior Channel Field Marketing Manager, META](https://feeny.ai/job/senior-channel-field-marketing-manager-meta-horizon3-ai-dubai-0d5m3qsarw9t) — Dubai, United Arab Emirates - [Channel Account Manager, Midatlantic](https://feeny.ai/job/channel-account-manager-midatlantic-horizon3-ai-united-states-fj7veyksksrn) — United States - [Senior Manager, Sales Compensation & Incentive Strategy](https://feeny.ai/job/senior-manager-sales-compensation-incentive-strategy-horizon3-ai-united-states-nyed00v8m8gz) — United States - [Manager, Commercial Sales](https://feeny.ai/job/manager-commercial-sales-horizon3-ai-washington-tzanjykxxkvy) — Washington, DC - [Commercial Account Executive, DC](https://feeny.ai/job/commercial-account-executive-dc-horizon3-ai-washington-p55jz13x238t) — Washington, DC - [Sales Engineer (Enterprise, Pacific NorthWest)](https://feeny.ai/job/sales-engineer-enterprise-pacific-northwest-horizon3-ai-united-states-qja22wvgb4sq) — United States - [Partner Operations, MSSP](https://feeny.ai/job/partner-operations-mssp-horizon3-ai-united-states-338jd1v1m3nm) — United States - [Product & Privacy Counsel](https://feeny.ai/job/product-privacy-counsel-horizon3-ai-united-states-6c6sgefxegx0) — United States - [Sales Engineer (SouthWest)](https://feeny.ai/job/sales-engineer-southwest-horizon3-ai-southwest-vrtjjnpsxa8b) — Southwest