Security Researcher / Developer

Get to Know Us

Horizon3.ai 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. 

As a remote first company, we require minimum 25Mbps consumer grade broadband connection.

What You’ll Do

The Security Researcher / Developer is responsible for leveraging the latest InfoSec news and swiftly weaponizing newly discovered public vulnerabilities for integration into our product. You will be involved in tasks ranging from vulnerability research, such as analyzing the web components of popular virtualization technologies, to patch-diffing firmware updates in VPN applications, to full-stack software development aimed at enhancing and extending the capabilities of our core product.

This is a dynamic position that offers the opportunity to work on a wide range of tasks, from building proof-of-concept exploits to advancing our red teaming technologies.

• Acquire and configure vulnerable test systems to replicate and validate attack scenarios.

• Develop and validate proof-of-concept exploits for identified vulnerabilities and ensure their integration into the core product.

• Collaborate closely with engineering teams to enhance product capabilities and develop new features.

• Maintain a comprehensive global view of emerging vulnerabilities, ensuring Horizon3 remains current with the latest threat landscape.

• Design and implement innovative solutions that advance our autonomous red teaming technologies.

• Utilize common Linux command-line tools (e.g., ssh, grep, scp) to support system configuration and exploit testing.

• Monitor and analyze public vulnerability databases, forums, and other resources for N-day vulnerabilities.

What You’ll Bring 

• Software Engineering: Strong understanding of secure software development practices, including experience with version control systems like Git and effective team workflows.

• Problem-Solving: Strong analytical skills with an aptitude for solving complex technical problems.

• Self-Motivation: The ability to work independently with minimal supervision, demonstrating initiative and a high level of energy.

• Collaboration: Work closely with the NodeZero team and N-Day researchers to weaponize reverse-engineered exploits for product integration.

• Communication: Strong technical writing and documentation skills, with the ability to convey findings and methodologies to both technical and non-technical stakeholders.

• Technical Design: Proficiency in designing, presenting, and evaluating technical solutions, ensuring high-quality software and secure development practices.

• Adaptability: Ability to independently learn and adapt to new technologies, tools, and methodologies.

Required Education/Experience:

• Proficiency in Python: Expert-level proficiency in large-scale Python software development.

• Vulnerability Exploitation: In-depth knowledge of common Remote Code Execution (RCE) techniques such as SQL injection, path traversal, and buffer overflow exploits.

• Network Protocols: Strong understanding of network protocols and their intricacies, including their role in exploitation vectors.

• Database Experience: Experience with relational (Postgres) or graph (Neo4j) database systems.

• Minimum of 4 years of experience in Vulnerability Research, Exploit Development, or other deeply technical roles with relevant skill sets.