Senior Full-Stack Engineer, Autonomous Defense Platform

Royper Royco LLC; United States; Remote; USD 195,000 - 235,000; Full time

Benefits offered by this job

Inclusive Team

Growth Opportunities

Innovative Culture

Hybrid & Remote Work

Competitive Compensation

Job summary

Horizon3 is seeking a Senior Full-Stack Engineer for the Autonomous Defensive team. You’ll build NodeZero’s platform runtime, UI, and data layers, collaborating with AI researchers to ship safe, auditable agent software across thousands of tenants.

You’ll own end-to-end features from backend APIs (GraphQL) to frontend interfaces, with strong emphasis on secure, scalable distributed systems, observability, and production readiness. Fully remote with potential travel.

Qualifications

• Bachelor's degree in CS/CE or related field.

Responsibilities

• Build and own the agent execution runtime with durable, resumable workflows and timeouts.
• Design and implement the tool layer with per-tenant enablement and server-side authorization.
• Build connector framework for third-party security control planes (EDR, firewall, identity, SIEM, cloud IAM).
• Implement safe-change pipeline with dry-run, simulation, and audit trails.
• Develop frontend in React/TypeScript for operator-facing interfaces and data visuals.
• Extend multi-tenant isolation with write actions, egress control, quotas, and cross-tenant security.

Skills

Bachelor's Degree in CS/CE

7+ years software engineering

GraphQL APIs

React

TypeScript

Cloud platforms (AWS/Azure/GCP)

Docker

Kubernetes

SQL (PostgreSQL)

Distributed systems

Education

Bachelor's Degree in Computer Science or related field

Tools

GraphQL

React

TypeScript

PostgreSQL

Docker

Kubernetes

AWS/Azure/GCP

Job description

Horizon3 is seeking a Senior Full-Stack Engineer for the Autonomous Defensive team. You’ll build NodeZero’s platform runtime, UI, and data layers, collaborating with AI researchers to ship safe, auditable agent software across thousands of tenants.

You’ll own end-to-end features from backend APIs (GraphQL) to frontend interfaces, with strong emphasis on secure, scalable distributed systems, observability, and production readiness. Fully remote with potential travel.