Senior Product Security Engineer

OneTrust
OneTrust

Software Engineering, Product

Madrid, Spain

Posted on Jul 23, 2026

Strength in Trust

OneTrust’s mission is to enable innovation through the responsible use of data and AI. We believe that ensuring data is trusted shouldn’t slow teams down—it should accelerate what’s possible. This led us to develop the first technology platform for responsible data use in 2016. Today, with AI representing the latest and most impactful expansion of data yet, OneTrust is once again redefining what responsible innovation looks like. OneTrust, the AI‑Ready Governance Platform™, unifies regulatory intelligence, automation, and connected governance workflows so businesses can continue to move at the speed of AI while ensuring good governance to prevent data misuse at scale. Trusted by thousands of organizations worldwide, OneTrust is shaping the future where trusted data becomes a transformative force for business and society.

The Challenge

OneTrust is seeking a Senior Product Security Engineer to lead hands-on product and application security work including penetration testing, remediation guidance, customer-facing security engagements, bug bounty operations, and vendor coordination, while helping expand coverage for AI-enabled features and agentic integrations.

Your Mission
  • Conduct application-level penetration testing across product surfaces, including web and mobile applications, to identify vulnerabilities and help drive remediation.
  • Partner with customers to coordinate penetration tests, communicate findings clearly, and provide practical remediation guidance to engineering teams.
  • Manage bug bounty workflows, work with external researchers, and track issues through closure.
  • Coordinate with product security vendors and internal stakeholders to improve the effectiveness and consistency of security testing.
  • Build and improve security automation and internal tooling, including AI-assisted workflows that support testing, triage, and validation across product security programs.
  • Assess AI-enabled product features, agentic workflows, retrieval pipelines, and tool integrations for risks such as prompt injection, tool misuse, tool poisoning, excessive permissions, and data exfiltration.
  • Test MCP servers and integrations through direct protocol testing, trusted-client testing, and multi-server adversarial scenarios, including validation of tool descriptions, schemas, permissions, and runtime behavior.
  • Partner with engineering teams to embed secure development practices for MCP and AI-connected components.

You Are
  • Proven experience in penetration testing and software security, with strong knowledge of security protocols, cryptography, and network security.
  • Experience working collaboratively with customers, developers, and vendors, along with strong written and verbal communication skills.
  • Scripting and automation experience for scaling security testing and remediation workflows.
  • Fluency in English.
  • Bachelor’s degree in Computer Science, Information Security, or a related field preferred; equivalent experience may be substituted.
Preferred Qualifications
  • Proficiency in Spanish.
  • Hands-on experience with Burp Suite and deep application security testing experience.
  • Relevant offensive security certifications such as OSCP or GWAPT.
  • Familiarity with AI security frameworks and practices, including OWASP guidance for GenAI and agentic systems and adversarial testing approaches aligned to recognized industry frameworks.

Where we Work

We are embracing an office-first culture, encouraging three days a week in office for most roles, with meaningful opportunities to collaborate and celebrate in person.Each role may have specific requirements or flexibility depending on the scope of the position, so we encourage you to verify this with your recruiter during your first interview.

Benefits

As an employee at OneTrust, you will be part of the OneTeam. That means you’ll receive support physically, mentally, and emotionally so that you can do your best work both in and out of the office. This includes comprehensive healthcare coverage, flexible PTO, equity RSUs, annual performance bonus opportunities, retirement account support, 14+ weeks of paid parental leave, career development opportunities, company-paid privacy certification exam fees, and much more. Specific benefits differ by country. For more information, talk to your recruiter or visit onetrust.com/careers.

Resources

Check out the following to learn more about OneTrust and its people:

Your Data

You have the right to have your personal data updated or removed. You also have the right to have a copy of the information OneTrust holds about you. Further details about these rights are available on the website in our Privacy Overview. You can change your mind at any time and have your personal data removed from our database. In order to do this you must contact us and let us know you wish to be removed. The request should be made on the Data Subject Request Form. Recruitment fraud warning: OneTrust is aware of scams involving false offers of employment with our company. The fraudulent jobs, interviews and job offers use fake websites, email addresses, group chat and text messages. Be aware that we never ask candidates for personal information, IDs or bank information during the interview process. We do not interview prospective candidates via instant message or group chat, and do not require candidates to purchase products or services, or process payments on our behalf as a condition of any employment offer. Please note that any legitimate interview availability requests will come directly from a OneTrust recruiter with an "@onetrust.com" email address. You may also receive legitimate emails from "@us.greenhouse-mail.io". Recruiters will only reach out to candidates who have applied for a role through our ATS (Greenhouse) or prospects via LinkedIn InMail. Job offers will come from a recruiter and may have a "@docusign.net" email address. For more information or if you have been targeted please reach out to askrecruiting@onetrust.com.

Our Commitment to You

 When you join OneTrust you are stepping onto a launching pad — the countdown has begun. The destination? A career without boundaries working alongside a diverse and inclusive crew who is passionate about doing meaningful work. As a pioneer, your voice and expertise will help chart the direction of an entirely new category. Our commitment to putting people first starts with you. Your growth is part of the mission. Our goal is to give you the power to embark on the next phase of your uniquely, unique career. OneTrust provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by local laws.
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