Senior Security Engineer, Threat & Offensive Security

• Conduct security testing and penetration tests across applications, infrastructure, and networks
• Manage and implement security testing tools and frameworks to simulate real-world attacks
• Design and implement AI-enabled workflows to scale security testing and threat operations
• Manage and operationalize threat intelligence to anticipate emerging threats
• Partner with external pentesting firms for independent security reviews
• Perform security reviews of new systems, features, architectures, and third-party integrations
• Collaborate with Engineering, IT, and Product teams to remediate vulnerabilities
• Develop playbooks and procedures for offensive security testing and incident response

About the Company Valon is building the AI-native operating system for regulated finance, starting with mortgage servicing.

We're a Series C company backed by a16z, transforming industries that others have written off as too complex to innovate.

Rather than build on top of broken legacy systems, we took a different approach: we built and operate our own mortgage servicing business managing $110+ billion in loans. This wasn't the end goal, it was how we deeply understood the complexity needed to build software that actually works in regulated industries.

The results speak for themselves. We've transformed mortgage servicing from a 0% margin business into 60%+ margins while dramatically improving customer experience. Major enterprise contracts are now deploying across the industry.

ValonOS is our unified platform that makes every process structured and programmable and it is perfectly positioned for the AI era. When everything flows through one system with rich data, AI agents don't just automate tasks, they continuously improve entire operations. Mortgage servicing is just the beginning of our vision to transform regulated industries and beyond.

Security at Valon Our customers entrust us with some of their most sensitive and personal financial information, and it is the ultimate mission of Valon’s Security team to ensure we have sound programs, processes, and automation in place to safeguard our customers’ data. The Security team protects the infrastructure and data for processing billions of dollars of mortgage loans.

In addition to protecting Valon’s internal systems, the Security team partners closely with Product and Engineering to design and deliver secure, scalable, and trustworthy capabilities for ValonOS. We work cross-functionally across all teams at Valon to enable security throughout the organization. We engage with external security auditors, pentesting firms, and partners to continuously evaluate Valon’s security posture.

Valon offices are located in New York City and San Francisco, but we fully support remote work!

About the Role We are seeking an experienced and skilled Senior Security Engineer, Threat & Offensive Security to join our growing team! As a key security member at Valon, you will help scale and strengthen our offensive security and threat operations, proactively identifying weaknesses in our systems, networks, and applications as the company continues to grow.

This position requires a deep understanding of adversarial techniques, security testing methodologies, threat intelligence, and incident response, along with the ability to collaborate with cross-functional teams. Importantly, this role requires an AI and automation-first approach to security work, using modern tools to scale testing, threat management, and response. You will help ensure security is embedded across our environment and that we continue to safeguard our most critical assets and maintain the trust of our customers and stakeholders.

Responsibilities

• Drive and conduct security testing and penetration tests across applications, infrastructure, and networks to identify exploitable vulnerabilities

• Manage and implement security testing tools and frameworks to simulate real-world attacks and validate the effectiveness of existing security controls

• Design and implement AI-enabled workflows to scale security testing and threat related operations.

• Manage and operationalize threat intelligence to anticipate emerging threats and adjust defenses proactively

• Partner with external pentesting firms for periodic, independent reviews

• Perform security reviews of new systems, features, architectures, and third-party integrations, providing actionable risk-based recommendations

• Collaborate with Engineering, IT, Product and other teams to remediate identified vulnerabilities and strengthen security controls

• Develop and refine playbooks, procedures, and standards for offensive security testing, threat monitoring, and incident response

• Monitor and manage security alerts and incidents, analyze data, and respond to security events

• Support operational activities including general security reviews, security monitoring, vendor security, issue remediation, security awareness, audit/compliance, and other processes

Ideal Background

• Proven experience in security engineering, red team, or threat management role, with a focus on penetration testing, security testing, threat intelligence, and/or incident response

• Hands-on experience with security testing tools and frameworks (e.g., Burp Suite, Metasploit, Nmap, Cobalt Strike, or similar)

• Demonstrated experience leveraging AI and automation to improve the efficiency and scalability of threat detection, testing, and response operations

• Proficient in both manual and automated testing techniques, understanding when manual analysis is needed versus pure automated testing

• Strong understanding of common attack techniques, exploitation methods, and MITRE ATT&CK or related

• Experience with SIEM, EDR, and other detection/monitoring platforms

• Experience with cloud security and environments (GCP, AWS)

• Ability to work autonomously, lead projects, and navigate complex, ambiguous security investigations

• Ability to foster strong relationships and partner with stakeholders to drive remediation and results

• Excellent communication and collaboration skills, with the ability to explain technical findings and risk to both technical and non-technical stakeholders

• Applied knowledge of industry security and testing frameworks (OWASP, NIST, MITRE ATT&CK, CIS, SOC 2/ISO 27001 concepts)

• Experience or exposure to startup environments is a plus

Minimum Qualifications

• Minimum of 5 years in a security engineering, penetration testing, threat intelligence, or similar roles with relevant responsibilities and background

• Bachelor's degree in Computer Science, Information Security, Technology, or a related field

• Relevant securit

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