Jobs in the United States

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Added 1 min ago
Network Engineer
Altagrove LLC
Honolulu, HI
Familiarity with QoS, multicast, SD-WAN, network automation, Python/Ansible, APIs, or infrastructure-as-code concepts is a plus.
Added 2 mins ago
Senior ASIC Engineer - Post Silicon Validation
Cisco
San Jose, CA
Prior experience working with firmware, bootloaders, and low-level silicon debug environments; fluency in C, Python, and scripting for validation automation.
Added 4 mins ago
Principal Engineer - Java Full Stack
Wells Fargo Bank, N. A.
IRVING, TX · ISELIN, NJ
Wells Fargo is seeking a Principal Engineer as part of the Commercial and Corporate & Investment Banking Technology (CCIBT) team to support Payment Solutions, Capital Markets Services,…
Added 7 mins ago
L
Electrical Engineer I
Longshot
Alameda, CA
- $120,000 to $140,000 USD / year
Experience in working with C/C++ on a microcontroller, and Python for test automation or data analysis.
Added 7 mins ago
ZI
DevOps / DevSecOps Engineer
ZENITH INFOTEK LLC
Cupertino, CA
- $60 to $65 USD / hour
We are looking for a highly skilled DevOps / DevSecOps Engineer to support large-scale cloud-native platforms in a fast-paced enterprise environment. The ideal candidate should have strong…
Added 12 mins ago
Senior Cloud Operations Engineer
nCino, Inc.
Wilmington, NC
…and customers who depend on it. The Senior Cloud Operations Engineer handles implementation, administration, and monitoring for the systems that let teams release software quickly. Day to…
Added 15 mins ago
A
Entry Level Devops Engineer
Actalent
Waterloo, IA
- $37.5 USD / hour
We are seeking a motivated Junior DevOps Engineer to join our engineering team. This role is ideal for an early-career professional who is passionate about software development, automation,…
Added 15 mins ago
AT
Software Engineer II
Akamai Technologies, Inc.
Des Moines, IA
- $95,000 to $171,000 USD / year
As a Software Engineer II, your code will serve high-traffic, global applications while you gain deep expertise in large-scale system design, performance engineering, and emerging…
Added 26 mins ago
Security Engineer, Security for Employee and Legal Systems (SEALS)
Amazon.com Services LLC
Seattle, WA
● Execute security assessments and code reviews for HR and Legal applications using your team's established processes and tooling, primarily in Java, Python, and JavaScript.
Added 27 mins ago
Staff Software Engineer, Business Systems & Integrations
Groq
NY
Groq is seeking a hands-on Senior Software Engineer, Business Systems & Integrations to architect, build, and scale the core software engines connecting our physical AI infrastructure…
Added 34 mins ago
AI Engineer
ServiceTitan, Inc.
Remote, United States
You will work on a small, senior AI platform team and partner closely with Product, Architecture, Security, Data Platform, Atlas, and domain engineering teams.
Added 36 mins ago
Staff DevOps Engineer (Platform)
1upHealth
Remote, United States
We are seeking a Staff DevOps Engineer to build and run the CI/CD pipelines, automation and test infrastructure that let our engineers ship safely and often.
Added 42 mins ago
Senior Application Security Engineer - Containers
ADP
Alpharetta, GA · Roseland, NJ
ADP is hiring a Senior Application Security Engineer - Containers
Added 43 mins ago
Software Engineer II - Advanced System Tools
RTX
United States
We are seeking a Software Engineer II to join our Advanced System Tools (AST) team based in Cedar Rapids, Iowa.
Added 43 mins ago
Senior Software Engineer – Tooling, Automation, and Verification Infrastructure
RTX
United States
We are seeking a Senior Software Engineer to support tooling, automation, and verification infrastructure within the Embedded Platform Software team in the Advanced Processing Architectures…
Added 45 mins ago
PT
Manager, AI Security & Harness Engineering
PAYCO The Clearing House Payments Company L.L.C.
United States
- Up to $140,000 USD / year
Experience developing production solutions using Python and APIs, with the ability to build integrations and automation across security platforms.
Added 45 mins ago
PT
AI Harness Junior Engineer
PAYCO The Clearing House Payments Company L.L.C.
United States
- Up to $85,000 USD / year
This position will help translate emerging AI capabilities into practical security solutions by developing AI harnesses, integrations, automation, and repeatable workflows. The engineer…
Added 45 mins ago
Test Engineer
Peraton
Herndon, VA
Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading…
Added 47 mins ago
DevOps Architect
Netomi
Remote, United States
Write production-grade automation and tooling in Python and Bash, and contribute to Java/Node.js services where needed.
Added 48 mins ago
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Staff Software Engineer, Firewall
Horizon3
Remote, United States
- $225,000 to $265,000 USD / year
…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…
Added 49 mins ago
A
ASIC Verification Engineer
Amentum
Crane, IN
- $85,000 to $100,000 USD / year
Amentum is seeking a Computer Engineer to support verification of ASICs and/or FPGAs for high-reliability and security-focused systems for our Department of War customers. The engineer will…
Added 54 mins ago
Software Engineer III - Python/AI/MLOps
JPMC page
Wilmington, DE
As a Software Engineer III - Python/AI/MLOps at JPMorganChase within the Corporate Technology team, you serve as a seasoned member of an agile team to design and deliver trusted…
Added 54 mins ago
Lead Data Engineer - PySpark/Databricks/SQL/AWS
JPMC page
Wilmington, DE
Strong experience with Python, PySpark, Databricks, SQL, AWS and AI automation
Added 54 mins ago
Platform Engineer II
Amerisure Mutual Insurance Company
Farmington Hills, MI
The Platform Engineer II works closely with application engineering teams to enhance the design, development, and maintenance of an internal developer platform (IDP) that enables…
Added 55 mins ago
VS
Cleared AWS Platform / Infrastructure Automation Engineer (Washington, DC)
Virtual Service Operations
Washington, DC
- $175,000 to $230,000 USD / year
Virtual Service Operations (VSO) is seeking an experienced AWS Platform / Infrastructure Automation Engineer to join a highly skilled team delivering advanced cloud engineering capabilities…

Horizon3

Staff Software Engineer, Firewall

Remote, United States

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

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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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