Remote Senior Full-Stack Engineer - Autonomous Security

Horizon3; Oregon; Hybrid; USD 195,000 - 235,000; Full time

Benefits offered by this job

Health, vision & dental insurance

Equity/stock options

Flexible vacation policy

Parental leave

Job summary

Horizon3 is a fully remote cybersecurity company delivering NodeZero autonomous pentests. We seek a Senior Full-Stack Engineer to build the platform behind our defensive agents, handling runtime, orchestration, and the UI where required.

You will partner with AI researchers to ship scalable, secure, and auditable workflows across thousands of tenants, with strong backend presence and occasional frontend work.

Qualifications

• Bachelor's Degree in Computer Science, Computer Engineering or related field.
• 7+ years professional software engineering in OO/functional languages (Python, Go, Scala, C++, TypeScript).
• Proven backend APIs delivery, especially GraphQL, consumed from modern web stack.
• Production experience with React, TypeScript and modern CSS for complex workflows.
• Experience on AWS/Azure/GCP with Docker and Kubernetes.
• Expert SQL proficiency.
• Experience designing distributed systems with asynchronous workflows and idempotent retries.
• Track record shipping and operating production services including on-call ownership.

Responsibilities

• Build and own the agent execution runtime with durable, long-running workflows.
• Design tool layer with registry, versioning, per-tenant enablement and server-side auth.
• Develop connector framework for security control planes (EDR, firewall, IAM).
• Implement safe-change pipeline with dry-run, staging, gates, rollback, audit trail.
• Build operator-facing front end in React/TypeScript and the associated data layer.
• Create client-side streaming layer with WebSockets for live state updates.
• Extend multi-tenant isolation including egress controls and quotas.
• Develop ETL and GraphQL features for agent context, run history, remediation state.
• Build ETL pipelines turning pentest outcomes into research datasets.
• Instrument observability, tracing, and cost accounting across runs.
• Collaborate with AI researchers and product to ship production-ready capabilities.

Skills

Backend depth

Frontend understanding

Distributed systems

Cloud platforms

SQL proficiency

On-call ownership

Education

Bachelor's Degree in CS/Engineering

Tools

GraphQL

React

TypeScript

Docker

Kubernetes

Job description

Horizon3 is a fully remote cybersecurity company delivering NodeZero autonomous pentests. We seek a Senior Full-Stack Engineer to build the platform behind our defensive agents, handling runtime, orchestration, and the UI where required.

You will partner with AI researchers to ship scalable, secure, and auditable workflows across thousands of tenants, with strong backend presence and occasional frontend work.