Tutorial Building a SaaS — Part 4

Building a SaaS, part 4: auth and security

Surendra Tamang

Surendra Tamang

40 min read advanced
Authentication Security JWT RBAC OAuth

Prerequisites

  • Completed Parts 1-3 of this series
  • Understanding of JWT and OAuth
  • Basic security concepts

Authentication and Security at Scale

This part isn’t written yet. Here’s what it will cover.

What You’ll Learn

  • JWT Authentication: Stateless authentication with refresh tokens
  • Multi-Factor Authentication: TOTP and SMS-based 2FA
  • Role-Based Access Control: Implementing flexible RBAC
  • OAuth Integration: Social login and SSO
  • Security Headers: Protecting against common attacks
  • Rate Limiting: Preventing abuse and DDoS
  • Encryption: Data at rest and in transit
  • Audit Logging: Security event logging

Topics Covered

Authentication Systems

  • JWT implementation with refresh tokens
  • Session management strategies
  • Password security and hashing
  • Account lockout mechanisms

Authorization Patterns

  • Role-based access control (RBAC)
  • Attribute-based access control (ABAC)
  • Resource-level permissions
  • Dynamic permission evaluation

Security Hardening

  • Input validation and sanitization
  • SQL injection prevention
  • XSS protection
  • CSRF tokens
  • Security headers configuration

Compliance and Auditing

  • GDPR compliance
  • SOC 2 requirements
  • Audit trail implementation
  • Security monitoring

Part 5 continues with performance work.