Project: Velocity – Mobile-First Personal Loan Origination Platform
1. System Overview
The solution is a cloud-native, mobile-first digital loan origination platform that enables customers to authenticate, submit loan applications, upload documents, undergo automated credit evaluation, receive instant decisions, and complete e-signature formalities within a unified experience. The platform integrates with internal core banking services, third-party credit bureaus, and notification channels while ensuring compliance with security and regulatory requirements.

2. Layered Architecture Description
2.1 Presentation Layer

Mobile Banking App (iOS/Android) enhanced with loan origination modules.  
Multi-step application UI for personal details, employment data, loan amount, and document capture.  
Embedded e-signature interface for approved applicants.  
Real-time push and email notification triggers integrated into the user experience.


3. Core Application Layer
3.1 Loan Origination Service

Manages application workflow states: draft → submitted → verified → decisioned → signed → disbursed.  
Orchestrates form data, document uploads, credit checks, and decision engine requests.  
Applies business validations and eligibility rules before submitting cases to downstream systems.

3.2 Document Management Module

Accepts uploads via mobile camera or file system.  
Performs document format checks and metadata tagging.  
Stores encrypted documents in secure cloud storage.

3.3 Automated Decision Engine

Executes rules for loan eligibility using applicant data, income benchmarks, product policies, and internal thresholds.  
Integrates real-time credit score from Equifax.  
Includes an embedded fraud-detection scoring component as requested by the Risk Officer.  
Produces instant pre-approval or rejection decisions.

3.4 Notification Service

Sends status updates via email and mobile push.  
Triggers events for application submitted, approved, rejected, and funds disbursed.


4. Integration Layer
4.1 Core Banking Integration

Secure API gateway to validate user identity via SSO.  
Fetches existing customer profile, KYC status, and account details.  
Sends approved applications to the core loan management system for disbursement.

4.2 Credit Bureau Integration

Outbound API call to Equifax for instant credit scoring.  
Includes retry logic, SLA monitoring, and error fallback behavior.

4.3 E-Signature Integration

Connects to the enterprise-approved e-signature provider.  
Generates loan agreement PDFs with pre-filled customer and product details.


5. Data Layer
5.1 Application Data Store

Stores application records, workflow states, and audit history.  
Encrypted at rest using AES-256.  

5.2 Document Storage

Secure blob storage for KYC documents, pay stubs, identity proofs, and signed agreements.  

5.3 Audit & Compliance Logs

Centralized log stream for all user actions and system events.  
Retention and access controls aligned with PCI-DSS v4.0 and GDPR.


6. Infrastructure Architecture

Cloud-native deployment using auto-scaling compute clusters.  
API Gateway for secure access, throttling, and monitoring.  
Managed database service with automated backups.  
Observability stack for health checks, performance alerts, and traceability.  
Encrypted communication via TLS 1.3 for all service-to-service interactions.


7. Component-Level Architecture View
7.1 Component Summary Table



Component
Purpose
Key Capabilities
Interfaces




Loan Origination Service
Orchestrates end-to-end application lifecycle
Workflow, validations, data enrichment
Mobile App, Core Banking, Decision Engine


Document Management Module
Handles document intake and secure storage
Metadata tagging, format validation, encryption
Mobile App, Storage Service


Decision Engine
Executes rules and automated approval/rejection
Risk policies, income rules, fraud scoring, credit bureau integration
Loan Origination Service, Equifax


Fraud Detection Submodule
Prevents fraudulent applications
Fraud scoring based on patterns & signals
Decision Engine


Notification Service
Sends status updates
Push & email notifications, templating
Mobile App, Email Gateway


Core Banking Connector
Syncs customer profiles & disbursement actions
SSO validation, customer data retrieval, loan disbursement triggers
Core Banking APIs


Equifax Connector
Performs real-time credit checks
Score retrieval, retry logic, SLA management
Equifax API


E-Signature Integration
Enables agreement signing
PDF generation, signature workflow
E-Sign Provider


Application Data Repository
Stores all application data
Workflow states, audit, encrypted records
All application components


Audit Logging Service
Captures compliance logs
End-to-end traceability
All components




8. Security & Compliance Alignment

End-to-end encryption (AES-256 at rest, TLS in transit).  
Role-based access control for internal services and administrative operations.  
PCI-DSS v4.0 alignment for handling financial data.  
GDPR-compliant customer data rights (access, correction, deletion).  
Continuous monitoring with automated alerts for suspicious activity.