Staff Software Engineer, Firewall at horizon3ai · LumiJobs

Responsibilities

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.
You’ll build and evolve the services and integrations that connect NodeZero with WAF management platforms, assess coverage, and turn validated findings into accurate, safe remediation guidance. You’ll partner with Product, Engineering, AI research, and the Attack team to turn WAF workflows and attack-path evidence into useful, verifiable customer outcomes.
This role is a fit for an engineer who can make an ambiguous problem executable, lead technical direction across a workstream, and stay close to the code and customer impact from design through operation and iteration.
Own the technical approach for the Web Application Firewall workstream, from problem framing and design through sequencing, delivery, operation, and iteration.
Design and build reliable integrations with WAF management platforms and their APIs, accounting for differences in vendor policy models and behavior.
Define correctness checks so recommendations address the validated path while preserving legitimate traffic and service availability.
Build durable workflows for long-running or resumable operations, with appropriate handling for retries, idempotency, timeouts, and partial failure.
Where the product supports configuration changes, design safety controls such as tenant-scoped authorization, least privilege, precondition checks, auditability, and validation or recovery paths, including staged rollout and fast rollback for rules that can affect live application traffic.
Build observability that helps engineers and customers understand what the system assessed, what it recommends, and why.
Make regular production-code contributions while shaping architecture, leading design and code reviews, and raising the bar for quality, testing, security, and operational readiness.
Partner with Product and adjacent technical teams to clarify scope, sequence work, manage dependencies, and connect technical decisions to customer outcomes.
Mentor engineers, lead through influence rather than direct people management, and surface risks and tradeoffs early and clearly in writing.

Staff Software Engineer, Firewall

Responsibilities

Benefits

Company

horizon3ai

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