POS System
A modern point-of-sale system designed for Kenyan retail businesses, with inventory tracking, receipt generation, and real-time reporting.
Key Engineering Achievements
The engineering decisions and challenges behind this project
Sub-Second Transaction Processing
Retail checkout must be instant — any lag means lost sales and frustrated customers.
Optimized the sale flow with Prisma's transaction API for atomic inventory-deduction + sale-creation in a single database transaction. Implemented optimistic UI updates for instant feedback.
Complete sales processed in under 1 second including inventory update and receipt generation.
Smart Inventory Management
Retail businesses need real-time stock awareness to prevent overselling and identify reorder points.
Built automatic stock level tracking with configurable low-stock alerts, barcode/SKU search, bulk import via CSV, and category-based inventory views.
Store owners never run out of popular items — the system alerts them before stock hits critical levels.
Multi-Format Receipt System
Different businesses need different receipt formats — some use thermal printers, others need email receipts.
Implemented a receipt templating engine that generates thermal printer-compatible output, downloadable PDFs, and email receipts from a single transaction record.
One sale, three receipt options — businesses choose what works for their setup.
Project Analytics
A data-driven look at the project's architecture and performance
System Performance (ms)
Feature Coverage
Developer's Note
“Building the POS taught me that speed isn't a feature — it's the feature. A cashier processing 100 transactions a day feels every extra 200ms. Prisma's atomic transactions were the key to making it feel instant.”