Enterprise Auth Platform

Enterprise Auth Platform is a production-grade authentication and authorization infrastructure built for modern SaaS and enterprise applications. The platform provides a complete identity backbone with multi-tenancy, RBAC + ABAC authorization, refresh-token rotation, session management, organization isolation, queue-driven infrastructure, and production-grade security patterns. Built using NestJS 11, PostgreSQL 16, Redis 7, BullMQ, and Prisma ORM, the system is designed as a scalable foundation for SaaS products that require enterprise-level identity and access management without rebuilding authentication infrastructure from scratch. The architecture focuses on tenant isolation, policy-driven authorization, secure session handling, observability, and extensibility — allowing advanced features such as MFA, OAuth2/OIDC, SAML SSO, audit persistence, and OpenTelemetry tracing to be integrated without re-architecting the platform.

Most authentication systems begin as simple login implementations but quickly become difficult to scale in real-world SaaS environments. As products grow, requirements expand beyond basic authentication into tenant isolation, fine-grained authorization, session revocation, auditability, invitation workflows, device management, policy enforcement, and organization-level access control. Many teams attempt to solve these concerns incrementally, leading to fragmented authorization logic, duplicated permission handling, inconsistent session management, weak revocation mechanisms, and security gaps across services. The goal of this project was to build a production-ready identity infrastructure that centralizes authentication, authorization, organization management, and security concerns into a reusable, scalable platform suitable for modern enterprise SaaS systems.

• Layered NestJS modular architecture with bounded domains
• Global request pipeline with correlation ID propagation
• JWT authentication with tenant-scoped authorization context
• Opaque refresh-token rotation with family-based reuse detection
• RBAC + ABAC hybrid authorization engine
• Redis-backed permission and attribute caching
• BullMQ-driven asynchronous infrastructure pipelines
• Structured logging with AsyncLocalStorage request context
• Centralized exception handling and response standardization
• Prisma ORM with PostgreSQL 16 and UUID v7 identifiers
• Queue-driven mail, audit, notification, and security-alert infrastructure
• Docker-based local and production-ready deployment workflow

1. 01

   Opaque Refresh Tokens Instead of JWT Refresh Tokens

   Refresh tokens are stored as SHA-256 hashes and rotated transactionally to support secure revocation, replay detection, and token-family invalidation.

2. 02

   Hybrid RBAC + ABAC Authorization

   RBAC handles scalable permission grouping while ABAC enables dynamic, context-aware policy evaluation using user, organization, membership, resource, and request attributes.

3. 03

   Tenant-Scoped JWT Context

   JWT payloads include organization and membership context to enforce multi-tenant isolation consistently across services.

4. 04

   Modular Monolith Architecture

   A modular monolith reduces operational complexity while preserving strong domain boundaries and future scalability.

5. 05

   Queue-Driven Infrastructure Design

   BullMQ-based asynchronous processing decouples heavy infrastructure operations such as email dispatching, audit events, and security alerts from request-response flows.

• Designing secure refresh-token rotation with replay attack detection
• Implementing ABAC policy evaluation with cross-source attribute comparisons
• Maintaining tenant isolation across authorization and resource loaders
• Building reusable authorization decorators and guards
• Managing permission and attribute version invalidation
• Designing scalable session and device revocation workflows
• Propagating request context globally without prop drilling
• Balancing extensibility with operational simplicity

• Multi-tenant architecture with tenant-scoped JWTs
• Hybrid RBAC + ABAC authorization engine
• Refresh-token rotation with reuse detection
• Session management and device revocation
• Organization and membership management
• Queue-driven email and audit infrastructure
• Redis-backed permission and attribute caching
• Correlation ID request tracing
• Structured logging and exception standardization
• Role, policy, and permission versioning
• Organization invitations and access workflows
• Production-ready modular NestJS architecture

• Docker Compose local development workflow
• Hybrid local infrastructure workflow with PostgreSQL and Redis containers
• Production-ready Docker build pipeline
• Deployable to Railway, Render, Fly.io, ECS, and Kubernetes
• Health-check endpoint for container orchestration readiness probes
• Environment-based configuration validation with fail-fast startup

• Stateless JWT authentication architecture
• Redis-backed distributed caching strategy
• Queue-driven infrastructure for horizontal scalability
• Modular domain boundaries for future service extraction
• Version-based permission invalidation without token regeneration
• Organization-scoped authorization and resource isolation

• MFA with TOTP and recovery code support
• OAuth2 and OpenID Connect provider integration
• SAML SSO for enterprise identity federation
• Persistent audit logging and administrative dashboards
• OpenTelemetry tracing and metrics instrumentation
• Advanced policy management UI
• Distributed event streaming infrastructure
• Multi-region deployment readiness

• Modular monolith architecture over microservices to reduce operational complexity
• Database-backed authorization verification over fully stateless authorization for stronger security guarantees
• Redis caching with database fallback to preserve resilience during cache outages
• Opaque refresh tokens over JWT refresh tokens for secure revocation and replay detection
• Strict authorization validation introducing additional request verification overhead for improved tenant security

• NestJS
• TypeScript
• PostgreSQL
• Prisma
• Redis
• BullMQ
• Docker
• JWT
• Node.js
• Pino