# Staff Software Engineer, Firewall 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: $225K to $265K base salary per year (USD)
- Posted: 2026-10-30
- Apply by: 2026-12-14
- Apply: https://jobs.ashbyhq.com/horizon3ai/90a870d7-2a66-4245-9bfd-3f4d37d68882?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/horizon3-ai-staff-software-engineer-firewall/

## About the role

We’re hiring a Staff Software Engineer to serve as the hands-on technical lead for the Firewall pod within Precision Defense. NodeZero helps customers understand where Web Application Firewall policies do—and do not—protect them along validated attack paths, then take informed action. Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- Expert-level proficiency in large-scale Python software development
- 8+ years experience leading technical work at Staff, Lead, or comparable scope, including architecture, implementation, and cross-team influence
- Working knowledge of WAF platforms and policy models (i.e. AWS WAF, Cloudflare, F5, Imperva, FortiWeb, or ModSecurity/OWASP CRS), including rules, managed rule groups, and how vendor-specific behavior affects request inspection and blocking decisions
- Proficiency in other modern backend languages such as Go, or Rust, or a comparable language
- Experience designing service-oriented systems, APIs, or integrations, including how they behave under failure and partial completion
- Strong systems-design skills and the ability to make sound tradeoffs across correctness, reliability, security, and maintainability

Tags: Engineering

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/horizon3-ai-staff-software-engineer-firewall/