Requirements

Let's design a system for Digital Video KYC (Know Your Customer) verification. In today's world, verifying a customer's identity remotely is critical for various online services like banking, insurance, and e-commerce. A Digital Video KYC system allows customers to complete their KYC process through a live video call with a verification agent, enhancing security and reducing fraud compared to traditional document uploads. Our system will allow agents to initiate video calls with customers, guide them through the verification process, capture necessary information, and ultimately approve or reject the KYC application. We need to handle scenarios like document verification (e.g., confirming the authenticity of an ID presented during the video call), liveness detection (ensuring the customer is a real person and not a photograph or video), and data consistency across the system. Furthermore, the system should be designed to be auditable and compliant with relevant regulations. # Requirements ## Functional Requirements 1. **Customer Onboarding:** * Customers can initiate a Video KYC request. * Customers can schedule a Video KYC session. * Customers can upload required documents (e.g., ID proof, address proof) *before* the session (optional pre-upload). * Customers receive notifications (e.g., SMS, email) regarding their scheduled session. 2. **Agent Interface:** * Agents can view a list of pending KYC requests. * Agents can initiate a video call with a customer. * Agents can view customer-uploaded documents. * Agents can guide the customer through the verification process using screen sharing (simulated). * Agents can capture screenshots or recordings during the video call (simulated). * Agents can perform document verification checks (e.g., validating the ID number against a government database - simulated). * Agents can perform liveness detection checks (e.g., asking the customer to perform specific actions). * Agents can manually enter or extract information from documents during the call. * Agents can add notes or comments to the KYC application. * Agents can approve or reject the KYC application. * Agents can escalate a KYC application to a supervisor for review. 3. **Video Call Functionality (Simulated):** * Establish a peer-to-peer video connection (simulated - no actual video streaming required). * Enable screen sharing (simulated). * Enable recording or screenshot capture (simulated). 4. **Data Management:** * Store customer information, uploaded documents, video call recordings/screenshots, agent notes, and KYC status. * Provide audit logs for all actions performed on the system. * Support data encryption for sensitive information. 5. **Reporting and Analytics:** * Generate reports on KYC completion rates, average processing time, and agent performance. ## Non-Functional Requirements 1. **Scalability:** The system should be able to handle a large volume of KYC requests concurrently. While we won't implement horizontal scaling *directly*, the class design should avoid single points of contention. 2. **Security:** The system should protect sensitive customer data and prevent unauthorized access. Consider secure data storage and access control. 3. **Auditability:** All actions performed on the system should be logged for auditing and compliance purposes. This includes tracking who performed what action and when. 4. **Extensibility:** The system should be designed to easily accommodate new verification methods, document types, and compliance regulations. Consider using design patterns that promote loose coupling and extensibility. 5. **Modularity:** The system should be composed of independent, reusable modules. This improves maintainability and testability. 6. **Testability:** The system should be designed to be easily testable at the unit and integration levels. Employ Dependency Injection where appropriate to facilitate mocking. 7. **Thread Safety:** The system should be thread-safe, especially concerning data access and modification during concurrent KYC sessions. Employ appropriate synchronization mechanisms where needed. ## Core Entities 1. **Customer:** Represents a customer undergoing the KYC process. Contains information like name, contact details, and uploaded documents. 2. **Agent:** Represents a KYC verification agent. Contains information like name, employee ID, and assigned tasks. 3. **KYCApplication:** Represents a single KYC application. Tracks the status of the application (e.g., Pending, In Progress, Approved, Rejected), associated customer and agent, uploaded documents, agent notes, and video call recordings/screenshots (simulated). 4. **Document:** Represents a document uploaded by the customer. Contains information like document type (e.g., ID proof, address proof), file path, and verification status. 5. **VerificationCheck:** Represents a specific verification check performed during the KYC process (e.g., document verification, liveness detection). Stores the type of check, status, and results. 6. **VideoCallSession:** Represents the video call session between the customer and the agent. Tracks start time, end time, recording/screenshot details (simulated), and any associated errors. 7. **NotificationService:** An interface for sending notifications to customers (e.g., SMS, email). Implementation can be swapped out.

Design digital-video KYC (know your customer) verification system.

Requirements

Interview Simulation

Functional Requirements

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Non-Functional Requirements

Core Entity Identification

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