Secure Auth & Multi-Tenant System for Industrial SaaS

Cascade Water Services needed a secure, scalable authentication system for their operations platform. Multiple teams across different service regions needed isolated access to shared infrastructure, with strict data separation and role-based permissions.

Their existing setup had no multi-tenancy, no session hardening, and basic password-only auth. It wasn't built for a growing team operating across multiple sites.

OAuth 2.0 integration alongside custom auth flows

JWT-based session management with refresh token rotation

Session hardening: rate limiting, IP binding, token expiry policies, and brute-force protection

Secure password hashing with bcrypt and salt rounds

Tenant-isolated data layer in PostgreSQL with row-level security policies

Tenant-aware middleware that routes requests to the correct data scope automatically

Role-based access control (RBAC) per tenant: admin, manager, field operator roles with granular permissions

Tenant onboarding flow with automated provisioning

Redis for session caching, rate limiting counters, and token blacklisting

AWS deployment with environment isolation per tenant

Audit logging on every auth event: login, logout, failed attempts, permission changes

Zero unauthorized access incidents since deployment

Sub-100ms auth response times with Redis session caching

Clean tenant isolation supporting multiple service regions on a single codebase

Reduced onboarding time for new regional teams from days to hours