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Cloud-Native Auth System

Authentication and authorization platform with OAuth 2.0, RBAC, and multi-tenant support for cloud-native environments.

Node.js
TypeScript
PostgreSQL
Redis
JWT
Docker
View source

System Evidence

  • high throughput workload planning
  • Node.js, TypeScript, PostgreSQL implementation surface
  • 45% latency-focused optimization target
Traffic Target
8,000 req/sec
Latency Gain
45% lower
Reliability
99.95% uptime
Daily Data
100GB

Overview

A comprehensive authentication and authorization system designed for multi-tenant SaaS applications. Implements zero-trust security principles with fine-grained access control.

Problem

Multi-tenant applications need authentication, authorization, session control, and auditability without letting tenant boundaries leak through shared infrastructure.

Architecture

  • Auth Engine: OAuth 2.0 / OIDC compliant with JWT token management
  • RBAC: Hierarchical role-based access control with policy-as-code
  • Session Management: Redis-backed distributed sessions with automatic rotation
  • Audit: Complete audit trail with tamper-evident logging

Engineering Tradeoffs

  • Used JWTs for stateless API authorization while keeping Redis sessions for revocation control
  • Modeled permissions through roles and policies instead of scattering checks across services
  • Treated audit logs as product data, not only operational logs

Key Achievements

  • Handles authentication traffic for multi-tenant workloads
  • Supports tenant isolation with role-based permission models
  • Implements audit logging and security-focused controls
  • Includes compliance reporting support for security review workflows

Validation Focus

  • Test tenant isolation with cross-tenant access attempts
  • Verify token expiry, refresh, and session revocation paths
  • Review audit trails for authorization failures and privileged actions