Staff Software Engineer, Firewall

Horizon3, US, Remote

What you will do

What You’ll Do

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.

All jobs

Staff Software Engineer, Firewall

Horizon3, US, Remote

Posted pay

$225K–$265K

a year

Compared with similar jobs

This base pay is above the median for staff software engineering jobs that are remote in the US.

Median: $225K a year
Other jobs in the group: 355

We compare the middle of each posted range. This is base pay as posted. The group does not include this job.

Location: US, Remote
Work type: Remote
Level: Staff
Experience: 8+ years
Skills in the job text: Python
AWS
Go
Rust
Posted: 11 days ago
Last check: 3 h ago
Job type: Software engineering

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Horizon3

Open tech jobs: 92
With posted pay: 93%
Median posted base: $206K–$263K

About Horizon3: funding, hiring and pay

Horizon3

About Horizon3: funding, hiring and pay

Company facts

Money raised: $380MSum of funding rounds on record
Newest round: Series EAug 3, 2026

Funding records can have errors and can be missing. The company page has the links.

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What you will do

What You’ll Do

What you need

What You’ll Bring

Staff-level technical leadership: you can set direction for a workstream, make and explain tradeoffs, and bring other engineers along.
Strong hands-on software engineering skills, including a record of designing, shipping, and operating production backend systems.
Product-minded judgment: you can turn a broad goal into a shared problem definition, a practical technical roadmap, and a valuable first release without blocking future evolution.
A reliability and security mindset: you account for failure modes, correctness, authorization, auditability, and operational needs as part of the design—not as follow-up work.
The ability to work effectively across Product, Engineering, research, and customer-facing teams, including communicating complex technical decisions to different audiences.
A collaborative approach to technical leadership: you raise the bar through design, reviews, mentorship, and clear written decisions rather than relying on authority.

Required Tech Stack Experience

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.
Ability to translate ambiguous product or customer problems into concrete technical plans and deliver outcomes with cross-functional partners.
Clear technical writing and communication skills.

What Sets You Apart?

Experience in adjacent areas such as API security, bot management, rate limiting, or application security testing (DAST/pentesting), or exposure to network firewall platforms and segmentation.
Experience integrating with security or infrastructure platforms whose APIs and policy models vary by vendor.
Experience building security products or systems that assess control coverage, validate attack paths, or produce remediation guidance.
Experience designing safe automation for changes that can affect customer environments, including authorization, audit, validation, and recovery considerations.
Familiarity with cloud environments, containerization, and operating services at scale.
Experience working closely with Product, AI or applied research, or security practitioners to turn domain expertise into customer-facing software.

Travel Required

We are a fully remote company, and this job may require up to 10% of travel to be successful.

Staff Software Engineer, Firewall

What you will do

What You’ll Do

Staff Software Engineer, Firewall

What you will do

What You’ll Do

What You’ll Do

What you need

What You’ll Bring

Required Tech Stack Experience

Get to Know Us

You Belong Here

Pay and benefits

Compensation and Values

Perks of Horizon3

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