Attack Engineer, Horizon3
$215-240k
More information about location
Autonomous security solutions
Be an early applicant
Autonomous security solutions
101-200 employees
Be an early applicant
$215-240k
More information about location
101-200 employees
Company mission
To help find and fix attack vectors before attackers can exploit them.
Role
Who you are
- Ideal candidates are fluent in Python, comfortable shipping robust code to production, and excited by the challenge of applying their engineering skills to vulnerability research, exploitation, and offensive tooling
- Software Engineering
- Expert-level proficiency in Python for large-scale development
- Proficient in object-oriented design, test-driven development, and scalable code design
- Experience designing and integrating APIs, data structures, and full-stack system components
- Experience developing in fast-paced, product-driven environments with distributed teams
- Skilled with Git and modern team collaboration workflows (PRs, CI/CD, code reviews)
- Familiar with containerization and orchestration tools such as Docker and Kubernetes
- Comfortable working with relational (Postgres) and graph (Neo4j) databases
- Offensive Security
- Hands-on experience with exploit development, vulnerability research, and/or red team operations
- Deep understanding of common RCE techniques (e.g., SQL injection, buffer overflows, path traversal)
- Familiar with exploitation of network protocols, web apps, and complex enterprise software
- Ability to translate security research into functional, autonomous attacks within a product context
- Experience attacking Windows environments (e.g., Active Directory), cloud platforms (AWS, Azure, GCP), and/or Kubernetes
- Desired Skills
- OSCP (Offensive Security Certified Professional) or equivalent certifications
- Demonstrated experience using AI or LLM-based tools to enhance or automate exploit development, vulnerability triage, or security research workflows
- Contributions to open-source security tools, technical blog posts, or public vulnerability research
- Prior development experience within large-scale or multi-tenant SaaS applications
- Proficiency in additional programming languages (e.g., C, C++, Assembly) used in exploit development or reverse engineering
- Familiarity with Nuclei, Metasploit, BloodHound, and similar offensive tooling
- Expectations
- Outstanding analytical and problem-solving aptitude, especially when dealing with unfamiliar systems
- Self-motivated and energetic with the ability to operate independently with minimal supervision
- Ability to manage multiple priorities and deliver on both short- and long-term objectives
- Strong written and verbal communication skills; capable of creating technical documentation and explaining complex topics to a broad audience
- Demonstrated curiosity and adaptability; quick to adopt new technologies and domains
What the job involves
- We’re seeking an experienced Attack Engineer who blends deep software engineering expertise with a passion for cybersecurity. In this role, you’ll design and build production-grade systems that drive the offensive capabilities of the NodeZero platform. You’ll be responsible for researching and weaponizing real-world vulnerabilities, developing scalable exploit content, and leveraging AI technologies to automate and enhance attack workflows
- This is a high-impact, cross-disciplinary role for someone who wants to shape the future of autonomous offensive security
- Research and develop novel attack capabilities for integration into the NodeZero platform, focusing on autonomous red teaming and offensive security automation
- Weaponize newly discovered vulnerabilities (N-days) and reverse-engineered exploits for inclusion in productized attack chains
- Acquire, configure, and exploit vulnerable test environments to validate and demonstrate attack scenarios
- Extend and maintain platform architecture and data models to support new research and product features
- Monitor public vulnerability databases and threat intelligence sources to stay current on emerging threats
- Collaborate cross-functionally with engineers, product managers, and customer teams to resolve issues, enhance features, and drive customer value
- Mentor teammates and improve team processes, code quality, and research standards
- Author technical blog posts and internal documentation showcasing new capabilities, research, and methodologies
Our take
In an era marked by escalating cyber threats and data breaches, safeguarding digital assets has become a high priority across all industries. Amid this landscape, Horizon3.ai stands out as an autonomous security solution by addressing the critical need for robust cybersecurity.
At the heart of Horizon3.ai's mission is NodeZero™, a platform designed to elevate proactive security measures. Using this, customers can verify their security posture and identify potential vulnerabilities through self-service. This proactive approach to cybersecurity effectively thwarts potential exploits and ensures the integrity of their digital infrastructure.
With recent funding under its belt, the company is poised to further its ambition to develop into an industry-leading cybersecurity company. The infusion of funds will be channelled towards expanding its partner network and refining its offerings. Horizon3 aims to establish itself as a pivotal player in the evolving cybersecurity landscape, growing its presence across industries and geographies.
Kirsty
Company Specialist at Welcome to the Jungle
Insights
-8% employee growth in 12 months
Company
Funding (last 2 of 6 rounds)
Jun 2025
$100m
SERIES D
Aug 2023
$40m
SERIES C
Total funding: $187m
Company benefits
- Growth Opportunities: Be part of a dynamic and growing team with numerous career advancement opportunities
- Innovation-Driven Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking
- Flexible Work Environment: Enjoy the convenience and work-life balance that comes with remote work
- Inclusive and Diverse Team: We value diversity and promote an inclusive culture where everyone can thrive
Company HQ
SoMa, San Francisco, CA
Leadership
Snehal Antani
(Co-Founder & CEO)Graduated from the Rensselaer Polytechnic Institute with an MS in Computer Science. Previously worked at IBM as a Lead Architect, at GE Capital as the CIO of Distribution Finance and Splunk as the SVP & GM of Business Analytics & IoT.
Anthony Pillitiere
(Co-Founder)Graduated from the University of Maryland with a Bachelor's Degree in Computer Systems Networking and Telecommunications. Previously worked at the United States Air Force in multiple roles, including Deputy Chief Technology Officer.
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