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Summary: Designed and built the platform's authentication and identity system, including acting as an OAuth authorization server that issues tokens to third parties, inbound SAML 2.0 SSO, passwordless/ passkey authentication, OIDC brokering, social OAuth, four auto-detected API-key types, a complete session lifecycle, a hierarchical multi-tenant access model, gated elevated access, and hardening against brute-force and timing attacks.
Description: Built the platform's own OAuth authorization server so third-party applications can integrate against it.
Skill Signal: Implementing the provider side of OAuth (issuing and managing tokens), not merely consuming a third-party OAuth flow.
Description: Integrated a full spread of federated and modern auth methods.
Saml Sso: Inbound SAML 2.0 SSO via an industry SAML library (SAMLResponse processing, NameID extraction, per-provider configs, session + XSRF mint on success, email-domain rewrite).
Oidc Brokered: OIDC / OAuth via a hosted identity broker using a PKCE flow, with cache-stored PKCE state and secrets from a cloud secrets manager.
Social Oauth: Direct Google and Microsoft OAuth code-verification flows minting platform sessions.
Passwordless: Passwordless / passkey authentication via a managed passkey provider, at platform and venue scope.
Password: Email + password with verified hashing.
Social Token: Social-provider token exchange with graph validation.
Key Login: Direct key-based login for services and partners.
Enterprise Fit: Customer MFA and access policy inherited from the customer's own identity provider.
Description: Designed an auth model where the key format self-describes its type, auto-detected at the request entry point.
Account: Enterprise/account-scoped key (e.g., server-side widget proxy traffic).
User: User-scoped key.
Session: Browser session token with CSRF enforcement.
Login: Auth-flow-only key for services and partner integrations.
Encoding: The leading digit encodes the key type; the remainder encodes the record ID (see COMP-02).
Description: Built the full session lifecycle from login through refresh to termination.
Creation: Login assembles a full session context (identity, permissions, tenant/venue mappings, access matrix).
Storage: Durable session storage with a cache-tier copy (TTL-bounded); cache rebuilds from durable storage on miss.
Loading: Session context loaded and exposed to business logic on every authenticated request.
Refresh: Activity timestamp updated per request with a short debounce to avoid write contention/deadlocks.
Termination: Logout clears durable + cache session state and marks the session closed.
Seamless Reauth: A session-code path enables re-authentication without spawning duplicate sessions.
Hierarchy: System (product platform) → account (tenant) → venue → per-feature access, resolved into the session at login.
Brute Force: Cache-based escalating lockout (tiered cooldowns with an admin alert at the top tier).
Timing Attacks: Dummy hash verification on unknown users to normalize response timing.
Password Reset: Reset-state accounts are blocked from login and routed to a reset flow.
Csrf: Rotating XSRF tokens on every response (see COMP-08 for the frontend lifecycle).
Description: On a separate platform (see COMP-21), designed an auth model that cleanly splits credential verification from session management, two concerns, two systems.
Verification Only: A delegated identity provider (Supabase) verifies OAuth credentials and returns a verified email statelessly; its cookies are NEVER written to the browser.
Self Minted Sessions: The application mints and owns its own JWTs; the provider's session is discarded immediately after reading the email (throwaway clients with empty set()/remove()) to prevent a competing SSR cookie-refresh cycle.
Provider Agnostic Ui: UI never listens to provider-specific auth events, so alternate login paths (e.g. a developer bypass) behave identically.
Pending Registration: Proves an email was OAuth-verified before a user record exists, powers a fully stateless invite/registration path. aud=pending_registration, no subject, 1h expiry.
Full Session: Normal authenticated session, aud=authenticated, subject=user id, 7d expiry.
Note: Contrast with sections 1–6 above (the platform acting as its OWN OAuth authorization server); here the platform is the OAuth consumer but still owns 100% of session state.
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