Multi-Branch Point of Sale System
NexaPOS
NexaPOS is a business-focused point-of-sale system designed to support multi-branch retail operations through inventory tracking, sales processing, returns, cash shifts, role-based access, and audit logging.
The Problem
Retail businesses often struggle with disconnected sales records, weak inventory visibility, poor accountability, and manual operational workflows. The challenge was to design a system that could support daily retail activity while keeping branch-level data structured and traceable.
The Solution
I built NexaPOS as a backend-driven business system using Django and Django REST Framework, focusing on inventory control, sales workflows, returns, user roles, branch stock movement, audit logs, and operational reporting.
Challenges & Decisions
- • Designing clean workflows for sales, returns, and branch stock movement
- • Handling role-based access across superadmin, admin, storekeeper, and cashier users
- • Maintaining traceable audit logs for critical business operations
- • Structuring APIs for real-world POS testing and future frontend integration
Outcome
NexaPOS demonstrates my ability to build practical business-critical systems involving transactions, permissions, inventory, auditability, and operational workflows.
What I Learned
This project strengthened my ability to think beyond individual features and design complete systems around user flows, data integrity, scalability, maintainability, and real-world product needs.
Key Features
- • Multi-branch inventory management
- • Sales and sale item processing
- • Sale returns workflow
- • Cash shift opening and closing
- • Role-based access control
- • Audit logging and activity tracking
- • Low-stock monitoring
Tech Stack
Architecture Overview
Client / API Consumer
Frontend, admin dashboard, or API client interacts with the POS system through REST endpoints.
Django REST API
Handles authentication, validation, business rules, and exposes endpoints for inventory, sales, returns, shifts, and reports.
Role-Based Access Layer
Controls access for superadmin, admin, storekeeper, and cashier roles across branch-level operations.
Business Workflow Services
Coordinates core POS workflows including stock movement, sales processing, returns, cash shifts, and audit events.
Data Layer
Stores branches, products, branch stock, sales, sale items, returns, cash shifts, customers, users, and audit logs.
Reporting & Audit Trail
Provides traceability for business-critical actions, low-stock monitoring, sales history, and operational accountability.
Project Focus
Product Walkthrough
A glimpse into the key experiences that shape the product journey.
System Flow ⭐⭐⭐⭐
Open Cash Shift
Cashier starts a working session to track sales activity and accountability.
Process Sale
System records sale items, customer type, payment details, and totals.
Update Branch Stock
Inventory is reduced at branch level after each completed sale.
Handle Returns
Returned items are tracked and linked back to the original sale workflow.
Write Audit Log
Critical actions are recorded to support traceability and operational oversight.
Sales Processing
Fast checkout workflows designed for everyday retail operations.
Inventory Management
Real-time visibility into stock levels across multiple branches.
Audit Trail
Operational transparency through structured activity logging.
Interested in building something like this?
I design, develop, test, deploy, and automate scalable systems for real-world products and business workflows.
Get In Touch