Security Engineer

About Yousign Yousign (soon to be Youtrust) is a European Digital Trust provider, fully compliant with eIDAS and the highest European standards. Our three modules – electronic signatures, identity and document verification, and e-seals – can be used independently or combined within sector-specific workflows, ensuring simple, secure and legally compliant processes for SMEs and mid-sized companies. Hosted and processed entirely in Europe, we guarantee sovereignty, transparency and reliability. As a certified B-Corp, we combine innovation with responsibility – building trust at the heart of every digital exchange. We are entering a key moment as we expand from eSignature to the full Digital Trust chain. Position Overview Yousign is building the future of trust and electronic signatures in Europe. As we scale, the regulatory and security landscape is evolving rapidly: eIDAS v2, NIS2, post-quantum cryptography, and increasingly complex technical standards are reshaping the industry. To meet these challenges, we are looking for a Senior Security Engineer to join our Security & Compliance team. This role requires genuine seniority: you will be expected to operate with a high degree of autonomy, make sound judgment calls under ambiguity, and lead initiatives end-to-end without waiting to be directed. You will be a senior voice in the team: mentoring peers, challenging assumptions, and bringing the experience needed to navigate complex trade-offs between compliance, security, and business velocity, while remaining hands-on and deeply embedded in the work. About the job Yousign is a European leader in electronic signature solutions, trusted by thousands of businesses to secure and streamline their document signing processes. We operate in a highly regulated environment where compliance isn't optional: it's a competitive differentiator and a foundation of customer trust. Our Security & Compliance team sits at the intersection of regulation, engineering, and operations. We don't just interpret standards: we implement them, audit them, and build the infrastructure that makes Yousign a trusted qualified trust service provider. This role is for someone who thrives in a fast-moving scale-up environment: comfortable with ambiguity, obsessed with pragmatic solutions, and energized by the challenge of scaling compliance operations without sacrificing agility. You'll work with a team that uses n8n, AI tooling, and smart alerting to stay ahead, and you'll be expected to contribute to that culture of continuous improvement. The position is open to remote working but requires living in the Paris region. Your Team You will join the Security & Compliance team: a team of 4 individual contributors with deep expertise across PKI infrastructure, technical security, and compliance operations. The team covers three critical domains: Compliance: eIDAS, NIS2, ETSI, ISO 27001 Security: product security and all aspects of Yousign's security posture Fraud: detection and prevention of fraudulent use of the Yousign platform The team also owns and maintains the Trusted Zone environments, including PKI, HSM, and NTP infrastructure: a critical layer for Yousign's qualified trust services. How we work: A weekly rotating "on-call" (doctor) role to triage incoming issues, unplanned requests, and urgent compliance matters A quarterly roadmap with structured planning, prioritization, and stakeholder alignment ahead of each quarter Automation at the core: n8n workflows, AI-powered tooling, and proactive alerting are part of our daily toolkit Your Missions Compliance Own and drive compliance initiatives end-to-end across eIDAS, NIS2, ETSI standards, and ISO 27001 Conduct and coordinate internal audits, gap analysis, and remediation plans Prepare and support external certification audits and qualification requests (LSTI, ANSSI, or equivalent bodies) Build and maintain compliance documentation frameworks that scale with the business Monitor regulatory developments and proactively assess their impact on Yousign Security Contribute to the security of the Yousign product: participate in security reviews, threat modeling, and vulnerability assessments on product features Participate in threat assessments, security reviews, and incident response when needed Collaborate with Engineering and Product teams to embed security best practices into development and operations Fraud Support the detection and investigation of fraudulent use patterns on the Yousign platform Contribute to defining and improving fraud prevention mechanisms in collaboration with Product and Engineering Cross-cutting responsibilities Participate in the weekly on-call rotation to handle unplanned compliance and security topics Mentor teammates and contribute to raising the bar on compliance practices across the team Identify and implement automation opportunities to reduce manual toil and increase team velocity Who are you ? Feel like applying ? Here are the main skills that will help you thrive as Yousigns’ next Security Engineer : You have at least 3 years of experience in a compliance role You have worked in at least one scale-up or fast-growing company, where you navigated ambiguity, high parallelization, and frequent context switches You have hands-on experience with technically complex compliance topics - you're comfortable going deep into standards, not just summarizing them You have contributed to product security initiatives: vulnerability management, penetration test coordination, threat modeling, or security reviews with engineering teams Familiarity with eIDAS regulations, ETSI technical standards, or regulated trust services is a strong plus Experience interacting with regulatory bodies (ANSSI, LSTI, or equivalent) is a bonus However, If you don't match all of those criteria, no worry ! You can still apply and let us know how you will be a good fit for the position, our Talent Acquisition team will have a close look at your application. Why join Yousign now? A mission that matters in a world challenged by AI-driven fraud A vision built on integrity A European & sovereign platform A certified B Corp The golden age of Yousign Benefits Salary range : 65k-75k + BSPCE Meal vouchers (Swile): €10.50/day, 50% covered by Yousign. Health insurance (Alan): Basic plan at €62.50/month, 50% covered by Yousign. Life & disability insurance: 100% employer-covered. Wellbeing: Axomove (4 physio sessions) and Moka.care (4 therapy/coaching sessions). Transportation: 50% reimbursement for public transport for hybrid workers. Leeto: Access to numerous employee discounts (cinema, travel, leisure, sports, etc.). Time off: 10 RTT days/year, plus menstrual leave, parenthood benefits, seniority days, and “journée de solidarité.” Additional benefits: 1 volunteering day/year, learning & development budget, and more. Recruitment process 1 Interview TAM with Guillhem, Talent Acquisition Manager – 30 min 2 Interview with Tony, Hiring Manager – deep dive into your experience – 1h 3 Case study presentation – showcase your strategic approach – 1h30 4 Final conversation with Kevin, Director of Engineering – culture fit & vision alignment – 1h