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Case Study — 02

Lock Module

A secure authentication and access-control system with JWT-based sessions, role-based permissions, and audit logging.

Technology Stack

TypeScriptFastAPIPostgreSQLDockerREST APIs

The Problem

Applications required a repeatable, secure authentication layer with fine-grained permission control and full audit trails.

The Solution

Designed a reusable locks-and-permissions module with JWT authentication, role-based access control, and comprehensive audit logging.

Architecture

  • JWT token-based authentication flow
  • Role-based access control middleware
  • PostgreSQL for user and permission storage
  • Docker for isolated service deployment