Security Engineer — Product, BugBounty & Compliance

Yousign; Paris; Hybrid; EUR 53,000 - 79,000; Full time

Benefits offered by this job

Stock options BSPCE

Meal vouchers Swile

Life & disability insurance

Wellbeing: Axomove & Moka.care

Transit reimbursement 50%

Leeto employee discounts

RTT days and special leave

Volunteering day + development budget

Job summary

Youtrust is expanding from eSignature to a full Digital Trust platform. We seek a Security Engineer to partner with Product, own risk-based guidance, and lead security reviews end-to-end. You will handle BugBounty, manage vulnerabilities, and contribute to eIDAS, NIS2 and ISO 27001 compliance.

The role blends product security with governance across the company. You will operate automation, mentor teams, and help balance security with business velocity, all while advancing a European, sovereign

Qualifications

• Deep, hands-on expertise in web application and API security.
• Ability to run threat modeling sessions and translate risks into requirements.
• Experience managing vulnerabilities across product perimeters and BugBounty programs.
• Familiarity with eIDAS, NIS2, ISO 27001 and security certifications.
• Proactive in using AI to automate security tasks and reporting.
• Comfort working across domains including compliance and fraud prevention.

Responsibilities

• Lead end-to-end security review cycles for all product features.
• Own and operate BugBounty program: triage, remediation, rewards.
• Identify, prioritise, and track remediation of vulnerabilities.
• Contribute to security of the Trusted Zone and fraud prevention efforts.
• Support regulatory compliance efforts and audits.
• Extend security expertise beyond Product to company-wide initiatives.
• Participate in weekly on-call rotation and build automation.
• Coach teams on secure-by-design practices and security awareness.

Skills

Web security

API security

Threat modeling

BugBounty programs

AI in security workflows

Regulatory compliance

Tools

n8n

AI tooling

Job description

Youtrust is expanding from eSignature to a full Digital Trust platform. We seek a Security Engineer to partner with Product, own risk-based guidance, and lead security reviews end-to-end. You will handle BugBounty, manage vulnerabilities, and contribute to eIDAS, NIS2 and ISO 27001 compliance.

The role blends product security with governance across the company. You will operate automation, mentor teams, and help balance security with business velocity, all while advancing a European, sovereign