# Senior Detection Engineer (EDR), Autonomous Defense at Horizon3.ai

- Company: Horizon3.ai
- What the company does: Horizon3 uses real-world attacks to safely show what attackers can actually do in your environment—so you can fix and prove what matters. Backed by NEA.
- Company website: https://horizon3.ai/
- Type: Startups (AI role)
- Level: Senior
- Location: US, Remote
- Work setup: Remote
- Pay: $195K to $230K base salary per year (USD)
- Posted: 2026-09-18
- Apply by: 2026-11-02
- Apply: https://jobs.ashbyhq.com/horizon3ai/b7292d93-0f57-4c29-9ec5-f75fc4110bc5
- Page: https://www.1752.vc/careers/jobs/horizon3-ai-senior-detection-engineer-edr-autonomous-defense/

## About the role

We're hiring a Senior Detection Engineer to be the blue team voice inside the Defensive Agent team. You'll sit between Product and Engineering as the person who defines what "correct" means. When an attack technique is detected, you decide what remediation that claim requires. Your judgment becomes the ground truth.

## What they're looking for

- Partner with Product to turn EDR effectiveness and tuning ambitions into concrete, buildable requirements
- Translate blue team workflows and pain into prioritized product outcomes, and push back when a proposed feature or agent behavior would not hold up in a real SOC
- Define acceptance criteria for detection, effectiveness, and tuning features, and validate releases against them before customers see them
- Serve as the standing domain reference for Engineering and AI research: available for design reviews, technique questions, and vendor behavior questions

Tags: Engineering