Staff Software Engineer, Firewall & WAF Systems Lead

Horizon3; Oregon; Hybrid; USD 225,000 - 265,000; Full time

Benefits offered by this job

Health insurance

Vision & dental insurance

Flexible vacation policy

Parental leave

Equity package

Remote & Hybrid work options

Job summary

Horizon3 is seeking a Staff Software Engineer to lead the Firewall pod within Precision Defense. You will drive the technical direction, build integrations with WAF platforms, and translate attack-path findings into actionable remediation guidance for customers.

You’ll collaborate with Product, AI research, and the Attack team to enhance WAF workflows, ensure reliability, and deliver secure, scalable systems.

Qualifications

• 8+ years in staff/lead level with architecture and cross-team influence.
• Expert Python backend development.
• Experience with WAF platforms and policy models.
• Ability to translate ambiguous problems into technical plans.
• Strong technical writing and communication.

Responsibilities

• Lead technical direction for the Web Application Firewall workstream.
• Design integrations with WAF management platforms.
• Define correctness checks for validated attack paths.
• Build durable, scalable workflows with retries and timeouts.
• Collaborate with Product, Engineering, and security teams.
• Mentor engineers and drive quality and security.
• Contribute production code while guiding architecture.

Skills

Staff leadership

Python

Backend systems

Cross-team influence

Technical writing

Tools

AWS WAF

Cloudflare

F5

Imperva

ModSecurity

Job description

Horizon3 is seeking a Staff Software Engineer to lead the Firewall pod within Precision Defense. You will drive the technical direction, build integrations with WAF platforms, and translate attack-path findings into actionable remediation guidance for customers.

You’ll collaborate with Product, AI research, and the Attack team to enhance WAF workflows, ensure reliability, and deliver secure, scalable systems.