Jobs in the United States

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Added 4 mins ago
Marketing Manager, Open Source Foundations
NVIDIA USA
CA
· Work with engineering, product, and developer relations teams to drive relevant technical content into foundation channels.
Added 6 mins ago
O
Senior Full Stack Developer (React.js, Python)
OpenDataJobs
Washington, DC
- $150,000 to $180,000 USD / year
Direct, practical use of AI-assisted developer tools, for example GitHub Copilot or Amazon Q Developer
Added 6 mins ago
O
Full Stack Developer (React.js, Python)
OpenDataJobs
Washington, DC
- $120,000 to $150,000 USD / year
…through production and finding and fixing its defects. Your automation replaces the spreadsheet workflows, manual checks, and validations in business operations, and you create deployment…
Added 11 mins ago
Technical Project Manager
Talnt
Tallmadge · Tallmadge, OH
…integration initiatives, business intelligence reporting, and process automation within a growing manufacturing, ecommerce, and logistics environment. This is a full-time, on-site…
Added 11 mins ago
IT Project Manager
Talnt
Tallmadge · Tallmadge, OH
Plan, coordinate, and execute IT projects involving software applications, database systems, business intelligence, reporting automation, and enterprise technology improvements.
Added 11 mins ago
Business Intelligence Manager
Talnt
Tallmadge · Tallmadge, OH
Evaluate opportunities to improve business intelligence capabilities through cloud analytics platforms, workflow automation, and AI-assisted data analysis.
Added 11 mins ago
Data Analytics Project Manager
Talnt
Tallmadge · Tallmadge, OH
…ideal for someone with experience in data analytics, reporting automation, data integration, and cross-functional project management who enjoys solving complex business problems through…
Added 11 mins ago
Technical Business Analyst
Talnt
Tallmadge · Tallmadge, OH
…systems, and reporting procedures to identify opportunities for automation, efficiency improvements, and better…
Added 14 mins ago
Site Reliability Engineer
Highmark Health
Little Rock, AR
…leaders and teams to navigate and to monitor and support building automation and facility systems, clinical engineering / IoT, healthcare delivery technology architecture, infrastructure…
Added 25 mins ago
PA
Industrial Engineer (Job Code: 176007)
Piston Automotive LLC
North Kansas City, MO
- $87,116 USD / year
…process improvements to improve overall efficiencies, including automation; benchmarking processes and equipment throughout the industry and incorporating, into Piston Standards; problem…
Added 25 mins ago
LCMS Scientist
Eurofins US Network
Saint Charles, MO
Experience with liquid handling, automation, solid-phase extraction (SPE), HTS applications, and large-scale screening
Added 25 mins ago
LC-MS/MS Sr. Scientist
Eurofins US Network
Saint Charles, MO
Experience with liquid handling, automation, solid-phase extraction (SPE), HTS applications, and large-scale screening
Added 25 mins ago
Scientist I Analytical Chemist
Eurofins US Network
Saint Charles, MO
Experience with liquid handling, automation, solid-phase extraction (SPE), HTS applications, and large-scale screening
Added 25 mins ago
Application Security Architect - AI Harness
Edward Jones
St. Louis, MO
Experience building secure code review automation, custom static analysis rules, vulnerability detection pipelines, benchmark datasets, or AI-based developer tooling.
Added 25 mins ago
Senior Technical Architect- Technology Architecture
Edward Jones
St. Louis, MO
Added 25 mins ago
Digital Resiliency Manager
Edward Jones
St. Louis, MO
The associate will work closely with leadership to formalize the strategies, documentation, testing and automation of tech business continuity and disaster recovery analysis and planning.…
Added 25 mins ago
Engineer III- Technology
Edward Jones
St. Louis, MO
Contribute to the adoption and integration of AI-enabled capabilities, automation, and data-driven solutions where appropriate
Added 25 mins ago
O
Lead Principal Site Reliability Engineer - (work in Vienna VA location)
Oracle
Jefferson City, MO
- $96,300 to $264,100 USD / year
…responsible for ensuring high availability, operational excellence, automation, and continuous improvement of production…
Added 25 mins ago
Site Reliability Engineer
Highmark Health
Jefferson City, MO
…leaders and teams to navigate and to monitor and support building automation and facility systems, clinical engineering / IoT, healthcare delivery technology architecture, infrastructure…
Added 25 mins ago
CC
Manager, Data Strategy
Centene Corporation
Jefferson City, MO
- $102,900 to $190,500 USD / year
…operational needs into an integrated roadmap of analytics, automation, AI/ML, and data-product initiatives; coordinates delivery across technical and business teams; manages portfolio…
Added 26 mins ago
Open Source Collector
BOOZ, ALLEN & HAMILTON, INC.
Saint Louis, MO
…writing, translation, tool benchmarking, policy recommendations, automation and scripting. You'll share your expertise with other collectors through leadership and mentoring. We focus on…
Added 26 mins ago
Supply Planning Quality Manager
RPM International, Inc.
Saint Louis, MO
Collaborate with IT to troubleshoot system issues, improve configurations, and increase automation opportunities.
Added 26 mins ago
Analyst - Quality Assurance
Anixter, Inc. Shipboard
Saint Louis, MO
Maintain practical regression coverage and identify repeatable tests for automation.
Added 26 mins ago
Lead Marketing Strategist, Events
Hagerty Management, LLC
United States
Familiarity with marketing analytics platforms, CRM tools, or marketing automation systems.
Added 36 mins ago
GA
Senior Systems Engineer SME Cloud Infrastructure & DevSecOps TS/SCI
Geospatial And Cloud Analytics Inc
Qua, VA
- $170,000 to $190,000 USD / year
Develop, configure, and maintain Infrastructure as Code (IaC) solutions using Terraform, OpenTofu, or comparable automation tools.

Horizon3

Staff Software Engineer, Firewall

Remote, United States

$225,000 to $265,000 USD / year

Apply About employer

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Job details

Pay: $225,000 to $265,000 USD / year
Experience: 8+ years experience leading technical work at Staff, Lead, or comparable scope, including architecture, implementation, and cross-team influence.
Posting language: English
Posted: Oct 30, 2026

Original job description

Get to Know Us

Horizon3 is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find, fix and verify exploitable attack vectors before criminals exploit them. Our flagship product, the NodeZeroTM platform, delivers production-safe autonomous pentests and other key assessment operations that scale across the largest internal, external, cloud, and hybrid cloud environments. NodeZero has been adopted by organizations of all sizes, from small educational institutions to government agencies and Global 100 enterprises. It is used by IT Ops/SecOps teams, consulting pentesters, and MSSPs and MSPs.

We are a fusion of former U.S. Special Operations cyber operators, startup engineers & operators, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools and false positives, resulting in alert fatigue, blind spots, "checkbox” security culture, cybersecurity skills shortage, and the long lead time and expense of hiring outside consultants. Collectively, we are a team of learn it alls, committed to a culture of respect, collaboration, ownership, and results.

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.

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.

What You’ll Do

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.

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.

Compensation and Values

At Horizon3, we believe that our people are our greatest asset, and our compensation philosophy reflects this core value. We are committed to fostering an environment where all employees feel valued, respected, and rewarded for their contributions. Our compensation structure is designed to be fair, competitive, and transparent, ensuring that every team member is recognized and compensated equitably across roles, levels, and locations.

In accordance with various State’s transparency regulations, we provide the following salary range information for this position:

Base salary range: $225,000 - $265,000 annually. The exact salary will be determined based on the selected candidate’s location, qualifications, experience, and relevant skills.
Additional compensation: All full-time roles are eligible for an equity package in the form of stock options.

Perks of Horizon3

Inclusive Team: We value diversity and promote an inclusive culture where everyone can thrive.
Growth Opportunities: Be part of a dynamic and growing team with numerous career development opportunities.
Innovative Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking.
Hybrid & Remote Work: We embrace a mix of remote and hybrid work models depending on role and location, including our Chicago office, where some roles require regular in-office presence.
Competitive Compensation: We offer competitive salary, equity and benefits. Our benefits include health, vision & dental insurance for you and your family, a flexible vacation policy, and generous parental leave.

You Belong Here

Horizon3 is not just an equal opportunity employer - we are a community that values diversity, equity, and inclusion as fundamental principles of our culture and success. We are dedicated to fostering a workplace where everyone feels welcome and respected, regardless of race, color, religion, sex, national origin, age, disability, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, hair length or any other legally protected status by law.

Our commitment to diversity and inclusion means we strive to attract, develop, and retain a workforce that reflects the varied communities we serve. We believe that diverse perspectives drive innovation and strengthen our ability to create cutting-edge cybersecurity solutions. At Horizon3, every team member is valued and supported in an environment that encourages personal and professional growth.

We welcome candidates from all backgrounds and experiences, and we encourage all qualified individuals to apply. Come be a part of Horizon3, where your unique contributions are recognized, and your potential is limitless.

Other Duties

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee. Duties, responsibilities, and activities may change at any time with or without notice.

Application Note

In any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information.

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More about this job

Skills

Cybersecurity
Research
Team leadership
Leadership
Python
Software development
AWS
CRS
Inspection
Go
Rust
Blueprints
Technical writing
Communication skills
Penetration testing

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