This role has a strong focus on user identity and account management - registration, authentication, authorization, and identity provider integrations - so hands-on experience with identity management platforms (e.g., Auth0, Okta) and IAM concepts (SSO, OIDC, SAML, MFA/passwordless auth) is highly valued. Design, build, and operate identity and account management systems - member registration and sign-in workflows, OTP/MFA verification, social login, account linking, and identity provider (e.g., Auth0) integrations.