Design Banking System

Requirements Definition

Users

• Customers: Can view their accounts, check balances, deposit/withdraw money, and transfer funds between accounts.
• Bank Employees: Can view and manage customer accounts, approve or reject loan applications.
• Administrators: Manage system users, monitor system health, and configure security settings.

Core Functionalities

• User Authentication: Secure login for all users.
• Account Management: Customers can open and close accounts, view balances, and see transaction history.
• Transaction Processing: Support for deposits, withdrawals, and transfers with real-time balance updates.
• Loan Management: Customers can apply for loans; employees can review and process these applications.
• Basic Fraud Detection: Monitor transactions for suspicious activity (e.g., large or unusual transfers).

Prioritization

• Must Have: User authentication, account management, transaction processing, and basic fraud detection.
• Should Have: Loan application and processing.
• Could Have: Enhanced fraud detection, customer support features, and reporting tools.

Out of Scope

• Investment products, insurance, third-party integrations, and advanced analytics are not considered in this design.