Context We are supporting a major banking client in strengthening its security production team. The objective is to onboard a technical expert capable of operating, maintaining, and evolving critical authentication and identity systems in a highly secure and demanding environment. This role is focused on deep technical expertise in authentication mechanisms, identity infrastructure, and production reliability. Responsibilities Production / Run (Core of the role) Ensure stability, performance, and availability of authentication and identity systemsTroubleshoot complex production incidents related to authentication flows and access mechanismsPerform deep technical analysis (logs, protocols, certificates, system behavior)Support critical systems in a high-availability environment Authentication & Security Infrastructure Work on authentication mechanisms (SSO, certificates, tokens, federation, etc.)Manage and troubleshoot identity-related components (LDAP, PKI, authentication services)Maintain and optimize secure communication flows (TLS, certificates, encryption) Continuous Improvement Identify weaknesses and propose improvements on authentication and access systemsContribute to automation and operational efficiency (scripting, tooling)Improve reliability and resilience of identity infrastructure Projects & Integration Support integration of applications with authentication systemsParticipate in evolution and modernization of identity and access platformsWork closely with infrastructure, security, and application teams Required Skills (Core expectations) Strong experience in production environments (L2/L3 support or equivalent)Solid understanding of authentication mechanisms and identity systemsGood knowledge of cryptography fundamentals:Certificates, PKI, TLSSymmetric / asymmetric encryptionStrong UNIX / Linux skillsScripting abilities (Shell mandatory, Python is a plus) Relevant Backgrounds (open profiles) We are open to candidates coming from different technical backgrounds, such as: Identity & Access Management (IAM / SSO)PKI / Certificate Management / CryptographySecurity Infrastructure / Authentication SystemsSystem Engineering with strong exposure to authentication and securityCloud Identity (Azure AD, Okta, etc.) Nice-to-have Experience with SSO protocols (SAML, OAuth2, OpenID Connect)LDAP knowledgeExperience with IAM tools (SailPoint, ForgeRock, etc.)Familiarity with Kerberos / SPNEGOAutomation tools (Ansible or similar) Profile 4–8 years of experience in security, infrastructure, or identity-related rolesStrong troubleshooting and analytical mindsetComfortable working in critical production environmentsCurious, adaptable, and able to ramp up on new technologies quickly Working Conditions Critical banking environmentOn-call rotation possibleHybrid setup (Montreal-based)