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Added 2 mins ago
Converge Signals, FSI - Engineering Lead_Products & Platforms
Deloitte US
Arlington Heights, IL · Atlanta, GA · Austin, TX · Baltimore, MD · Bellevue, WA · Birmingham, AL · Boise, ID · Boston, MA · Charlotte, NC · Chicago, IL · Cincinnati, OH · Cleveland, OH · Colorado Springs, CO · Columbus, OH · Costa Mesa, CA · Dallas, TX · Davenport, IA · Dayton, OH · Denver, CO · Des Moines, IA · Detroit, MI · Fort Worth, TX · Fresno, CA · Ft. Lauderdale, FL · Gilbert, AZ · Grand Rapids, MI · Hartford, CT · Hermitage, TN · Honolulu, HI · Houston, TX · Huntsville, AL · Indianapolis, IN · Inglewood, CA · Jacksonville, FL · Jericho, NY · Jersey City, NJ · Kansas City, MO · Lake Mary, FL · Lansing, MI · Las Vegas, NV · Los Angeles, CA · Louisville, KY · McLean, VA · Mechanicsburg, PA · Memphis, TN · Miami, FL · Midland, MI · Milwaukee, WI · Minneapolis, MN · Monterey, CA · Morristown, NJ · Nashville, TN · New Orleans, LA · NY · Omaha, NE · Philadelphia, PA · Pittsburgh, PA · Portland, OR · Princeton, NJ · Raleigh, NC · Richmond, VA · Rochester, NY · Rosslyn, VA · Sacramento, CA · Salt Lake City, UT · San Antonio, TX · San Diego, CA · San Francisco, CA · San Jose, CA · Seattle, WA · St. Louis, MO · Stamford, CT · Tallahassee, FL · Tampa, FL · Tempe, AZ · Tulsa, OK · Washington, DC · Westlake, TX · Wichita, KS · Williamsville, NY
Experience with Python/FastAPI (or comparable) backend development and React/TypeScript frontend development, sufficient to review and refactor both sides of a full-stack codebase
Added 1 hour ago
Senior AI/AML Engineer, Vice President
Citigroup
Jersey City, NJ
Strong proficiency in Python and backend development
Added 1 hour ago
Senior AI/AML Engineer, Vice President
Citigroup
Jersey City, NJ
Strong proficiency in Python and backend development
Added 1 hour ago
Head of AI Engineering (Architecture & Agents)
GoOpti B.V.
Remote, United States
each with an owner, a measure and a go/no-go gate. Lead one or two contract AI developers, work alongside our backend team, and teach managers how to write a good spec for an agent.
Added 3 hours ago
TT
Senior Full-Stack Software Engineer
True Talent Solutions Partners
Redwood City, CA
- $215,000 to $290,000 USD / year
- Strong front-end skills with React and TypeScript, plus backend experience with Node.js or Python and AWS.
Added 7 hours ago
O
Lead Principal Platform Software Engineer
Oracle
United States
- $113,600 to $306,400 USD / year
Proficiency in Python and Java with experience developing and maintaining production software in both languages.
Added 9 hours ago
Staff Software Engineer, Data & Scalability Platform
Cisco
New York, NY
Backend software engineering experience with either Go, Java, Rust, C++, and/or Python. Experience with cloud-native technologies, containerized environments (Kubernetes), and public cloud…
Added 16 hours ago
AE
Sr Software Engineer II - Enterprise Architecture
American Express
Phoenix, AZ
- $123,000 to $215,250 USD / year
6+ years of professional software development experience with strong expertise in Java and working knowledge of Python for backend or data-driven applications
Added 18 hours ago
Software Engineer III - Full-stack Developer with Anthropic Experience
Deloitte
Boston, MA
Design and operationalize RESTful and asynchronous APIs on cloud-native infrastructure (AWS, Azure or GCP), including containerized workloads, CI/CD pipelines, and infrastructure-as-code.
Added 18 hours ago
Production Support Lead - Products & Platforms
Deloitte
Boston, MA
…carriers modernize the claims experience. As Production Support Lead, you'll own L3 production support for ClaimBeacon, picking up the issues our L1/L2 team can't resolve through initial…
Added 19 hours ago
W
Staff Software Engineer (Backend, Business Systems)
Whoop
Boston, MA
- $170,000 to $230,000 USD / year
- Strong software engineering fundamentals and proficiency in at least one modern backend programming language (e.g., Java, Python, Go, or similar)., with a track record of writing…
Added 21 hours ago
Principal Full Stack Software Engineer (P60) - Growth
Atlassian
Remote, United States
As a Principal Full Stack Software Engineer (P60) on Starburst, you will serve as the lead technical anchor for multi-quarter onboarding and cross-flow initiatives across Atlassian's…
Added 1 day ago
Senior Backend Software Architect
NKW ImmunityBio Inc
United States
Lead the architecture, design, and evolution of backend software systems, ensuring scalability, reliability, security, performance, and long-term maintainability.
Added 1 day ago
TT
Director of Engineering
True Talent Solutions Partners
Remote, United States
- $210,000 to $240,000 USD / year
- Experience with TypeScript or Python, AWS, and MongoDB; familiarity with React is also relevant.
Added 1 day ago
AE
Sr Software Engineer I
American Express
Sunrise, FL
- $123,000 to $215,250 USD / year
6+ years of professional software development experience with strong expertise in Java and working knowledge of Python for backend or data-driven applications
Added 1 day ago
M
Senior Software Engineer
myLaurel
Remote, United States
- $170,000 to $190,000 USD / year
…role, you will contribute across our TypeScript, React, and AWS cloud ecosystem - collaborating with cross-functional teams to translate complex operational workflows and healthcare…
Added 1 day ago
O
Senior Full Stack Developer (React.js, Python)
OpenDataJobs
Washington, DC
- $150,000 to $180,000 USD / year
At Peregrine Advisors, you will take cloud-native Python services from refinement through production on Amazon Web Services (AWS), retaining ownership of each service's design and delivery…
Added 1 day ago
BA
Full Stack Developer, Senior
Booz Allen Hamilton
Aurora, CO
- $86,900 to $198,000 USD / year
Develop distributed, secure, scalable backend services using Python, Java/Spring Boot, or similar technologies
Added 1 day ago
BA
Full Stack Developer, Senior
Booz Allen Hamilton
Aurora, CO
- $86,900 to $198,000 USD / year
Develop distributed, secure, scalable backend services using Python, Java/Spring Boot, or similar technologies
Added 1 day ago
DA
Senior Software Development Engineer
Delta Air Lines, Inc.
Minneapolis, MN
- $81,300 to $221,000 USD / year
As a Senior Software Development Engineer, you will lead the design, development, and optimization of complex software applications. You will mentor junior engineers and collaborate with…
Added 1 day ago
Principal Software Engineer – Application Security & AI Trust Architecture
Cisco
San Jose, CA
Experience in at least one backend language (Python, Go, TypeScript/Node.js, Rust, or Java).
Added 1 day ago
Senior Specify Software Developer
University of Kansas
Lawrence, KS
Specify 7 is a mature, open-source web application built on Python, Django, TypeScript, and React. As a senior developer, take responsibility for significant features and technical…
Added 1 day ago
Sr. Software Development Engineer, Amazon Demand Side Platform, Forecasting
Amazon
New York, NY
…scale data visualizations. Our systems are based on a mix of AWS and third-party technologies, using ones that make the best sense in a given…
Added 1 day ago
Forward Deployed Software Engineer US Government
Palantir Technologies
NEW YORK, NY
…effectively identify instances of money laundering?" FDSEs lead the way in developing a solution, from high-level system design and prototyping to application development and data…
Added 1 day ago
PG
Senior Software Engineer
Publicis Groupe Holdings B.V
Irving, TX
- $88,900 to $165,100 USD / year
We are looking for a highly experienced Senior Software Engineer (7–10 years) to design, build, and scale robust backend systems using Java and Python in an Agile environment. This role has…

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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