Infrastructure Security Engineer – Banking

About the role

Keytrade Bank, a fully digital bank within the Crédit Mutuel Arkéa Group, is seeking an Infrastructure Security Engineer to strengthen the security posture of its on‑premises and cloud environments. Reporting to the Head of Network & Security, you will work closely with the Risk & Security team to protect critical banking services.

Key responsibilities

• Design, implement and maintain security infrastructures across on‑prem and cloud (AWS & Azure) environments.
• Monitor security alerts, conduct incident response and forensic investigations.
• Manage and optimise EDR/XDR solutions and the SIEM platform, including log ingestion, correlation rules and dashboards.
• Develop and enforce patching strategies for operating systems and infrastructure components.
• Support DevSecOps initiatives, including secret management and CI/CD security.
• Perform vulnerability assessments, coordinate remediation and harden Windows/Linux servers.
• Hardening of cloud services, administration of Web Application Firewall (WAF), PKI and DLP measures.

Required profile

• 5+ years of experience as a security engineer in a hybrid cloud environment.
• Strong hands‑on expertise in cybersecurity, incident response and L3 troubleshooting.
• Professional fluency in English (written and spoken).
• Clean certificate of good behaviour.

Required skills

• DevSecOps
• SIEM infrastructure (custom rules, dashboards)
• Incident response and forensic analysis
• EDR/XDR solutions
• AWS and Azure security services
• Patch management
• Vulnerability assessment tools
• Windows and Linux hardening
• Cloud hardening (AWS, Azure)
• Web Application Firewall (WAF) administration
• PKI management
• Data Leak Prevention (DLP)
• Python, Ansible, Terraform scripting/automation
• Container security (EKS, AKS, Docker)
• Microsoft 365, Microsoft Purview