Security Engineer

IDnow is a leader in digital identity and fraud prevention in Europe with a mission to transform trust into the most powerful asset in the digital world, empowering enterprises with AI-driven, SaaS-based identity solutions that deliver scalable security, adaptive compliance, and real-time fraud prevention.Through its broad portfolio of digital identity and fraud prevention solutions, IDnow establishes, maintains and enriches trust throughout the customer journey, ensuring businesses can confidently and securely operate while leveraging digital identity to drive growth, security and scalability.

The company has offices in Germany, United Kingdom, Romania and France, and is backed by renowned institutional investors, including Corsair Capital and Seventure Partners. Its portfolio of international clients spans a wide range of end markets including financial services, telecommunications, travel & mobility, gaming, and other industries.

This position is based in Rennes, France.

IDnow is seeking a skilled Security Engineer to join our team of 10 security professionals across France and Germany. Our team handles a wide range of security responsibilities, including maintaining and evolving the Information Security Management System (ISMS), securing product infrastructure, managing security monitoring and vulnerability processes, conducting threat modeling and penetration testing, supporting secure SDLC practices, and driving awareness across the organization. We work collaboratively to ensure security is embedded into all aspects of our business.

• Administer and support Hardware Security Module (HSM) environments, including processes related to encryption, signing, key lifecycle management, and secure operations.
• Support and maintain Public Key Infrastructure (PKI) components; contribute to PKI operations with a hands-on, practical approach.
• Perform complex assessments, threat models, and advanced penetration tests.
• Guide teams in identifying and mitigating security risks.
• Design and refine alerting and detection rules; investigate complex security incidents.
• Remediate incidents and conduct root cause analysis.
• Own and improve security tooling; evaluate and introduce new tools where needed.
• Conduct security design and architecture reviews.
• Provide actionable security guidance to engineering, infrastructure, and product teams.
• Ensure security requirements are integrated into system designs and configurations.
• Participate in vendor evaluations to provide security input.
• Produce in-depth analysis of complex security issues and propose strategic improvements.
• Design and deploy advanced security automation solutions.

• Higher education degree in Cybersecurity or equivalent experience.
• Experience with HSM administration, key management processes, and cryptographic operations
• Experience with PKI components, certificate management, and secure key lifecycle practices
• Strong background in risk assessment, security monitoring, and incident response.
• Solid understanding of infrastructure security, application security, and cryptography.
• Experience in threat modeling, cloud security, and scripting.
• Strong analytical thinking, problem‑solving skills, and communication abilities.
• Team‑oriented, adaptable, and proactive in continuous learning.
• Solution‑oriented mindset with attention to detail in documentation.
• Creative hacker mentality, autonomous, and self‑driven.
• Offensive security skills, AWS knowledge, and software development background are a plus.
• Fluent in English; German or French is appreciated.

• Health & Wellbeing: Use your full access to the mental health platform nilo, including 1on1 sessions.
• We value personal and professional development: make full use of Udemy, our training platform with 24/7 access and unlimited content/course consumption incl. certification.
• We make your remote work comfy: we provide support on equipment and offer flexible working hours.
• We value collaboration & love to come together: regular onsite gatherings, internal initiatives and summer parties to connect outside of work.
• May your family require your attention or other reasons apply: use the benefit of our paid special leave days.
• Enjoy the possibility to combine work with a longer stay at your holiday destination or extend a weekend with our Workcation possibilities.
• In addition to the perks & benefits above, we offer specific benefits that differ between our locations.

IDnow applies the principles of non-discrimination and equality: We strive to establish, maintain, and promote an open and inclusive recruitment process and working environment by respecting the principles of equal opportunities. Including but not limited to: sex, race or ethnic origin, religion or convictions, gender identity, citizenship, marital status, disability, age, or sexual orientation.