Staff Software Engineer, Firewall

🕒 October 30

🇺🇸 United States – Remote

💵 $225k - $265k / year

⏰ Full Time

🔴 Lead

🧑‍💻 Full-stack Engineer

👻 Ghost score 20%

What it means: the chance that no one is really hiring for this job.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Horizon3.ai

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2019

🔒 Cybersecurity

🤖 Artificial Intelligence

☁️ SaaS

Cybersecurity • Artificial Intelligence • SaaS

Horizon3. ai is a cybersecurity company that specializes in autonomous penetration testing through its platform, NodeZero. The company's mission is to proactively identify and address attack vectors before they can be exploited, allowing organizations to continuously assess their security posture across various environments including cloud, IoT, and on-premises systems. Founded by veterans from the US Special Operations and National Security sectors, Horizon3. ai offers a self-service SaaS solution that provides organizations with insights into their security vulnerabilities without requiring persistent or credentialed agents.

📋 Description

• Serve as the hands-on technical lead for the Firewall pod within Precision Defense • Own the Web Application Firewall workstream from problem framing and design through delivery, operation, and iteration • Design and build integrations with WAF management platforms and APIs • Define correctness checks that address validated attack paths while preserving legitimate traffic and service availability • Build durable workflows for long-running or resumable operations, including retries, idempotency, timeouts, and partial failure handling • Design safety controls for configuration changes, including authorization, least privilege, precondition checks, auditability, staged rollout, validation, recovery, and rollback • Build observability so engineers and customers understand assessments, recommendations, and rationale • Contribute production code while shaping architecture and leading design and code reviews • Partner with Product, Engineering, AI research, and Attack teams to clarify scope, sequence work, manage dependencies, and connect technical decisions to customer outcomes • Mentor engineers and lead through influence • Surface risks and tradeoffs clearly in writing

🎯 Requirements

• Staff-level technical leadership experience, including setting direction, making tradeoffs, and influencing engineers • Strong hands-on software engineering skills and experience designing, shipping, and operating production backend systems • Expert-level proficiency in large-scale Python software development • 8+ years of experience leading technical work at Staff, Lead, or comparable scope • Working knowledge of WAF platforms and policy models, including AWS WAF, Cloudflare, F5, Imperva, FortiWeb, or ModSecurity/OWASP CRS • Proficiency in Go, Rust, or a comparable modern backend language • Experience designing service-oriented systems, APIs, or integrations • Strong systems-design skills across correctness, reliability, security, and maintainability • Ability to translate ambiguous product or customer problems into concrete technical plans • Clear technical writing and communication skills • Experience in API security, bot management, rate limiting, application security testing, network firewalls, or segmentation is advantageous • Experience integrating security or infrastructure platforms with varying APIs and policy models is advantageous • Familiarity with cloud environments, containerization, and operating services at scale is advantageous

🏖️ Benefits

• Stock options/equity package for all full-time roles • Health, vision, and dental insurance for you and your family • Flexible vacation policy • Generous parental leave • Career development opportunities • Inclusive and collaborative work culture • Remote and hybrid work models depending on role and location

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