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RASHID LLC

A point-of-sale terminal that keeps selling when the network does not.

Offline-first
Keeps selling without network
Device-bound
Tablet paired to a warehouse
Android 7+
Tablet-optimised

The LogistikaUrbana POS sales screen on an Android tablet — a searchable grid of 150 Korean skincare products with category filters, beside an order panel showing the cart, an add-customer action and the running subtotal

The LogistikaUrbana POS sales screen on an Android tablet — a searchable grid of 150 Korean skincare products with category filters, beside an order panel showing the cart, an add-customer action and the running subtotal

Project details

Type
Client engagement
Category
Android / Point of sale
Status
Live
Region
Mexico City, Mexico

Technology

  • Kotlin
  • Jetpack Compose
  • Room
  • Hilt
  • Retrofit
  • Android SDK 24–35
  • Star Micronics TSP100III

Services involved

Overview

The counter half of the Logistika Urbana platform. Where the ERP is the back office, this is the app a cashier actually touches — a native Android tablet application handling sales, shifts, receipts, refunds and driver handovers.

It sells the same catalogue as the Yoon Lab storefront, off the same stock. The physical store is not a separate business with its own system; it is the same inventory, reached from a counter instead of a browser.

It is not a web page in a wrapper. It is a Kotlin and Jetpack Compose application with its own local database, built so the shop floor keeps working when the connection does not.

The challenge

A point of sale is the one system in a retail business that cannot be down. Connectivity in a physical store is not guaranteed, and a terminal that stops taking payments the moment the network drops costs real money at the counter.

It also has to be trustworthy in a second sense: a shared tablet on a shop floor needs to know which warehouse it belongs to and which member of staff is standing in front of it, without a login screen slowing down every sale.

And it has to talk to hardware — a receipt printer, a barcode scanner, a cash drawer — none of which behaves like a browser API.

The solution

A Kotlin and Jetpack Compose application with a Room database on the device, so tickets are held locally and reconciled with the server rather than lost when the connection goes.

Device registration by hash: a tablet is paired to a specific warehouse once, then staff authenticate with a short PIN per shift instead of a full login per transaction.

Direct integration with a Star Micronics TSP100III receipt printer, plus barcode and QR scanning, so the peripherals on the counter are driven from the app rather than through a workaround.

Shift management with cash reconciliation, pay-in and pay-out tracking, and refunds against an existing receipt — the operations a real counter needs at the end of a day, not just at the point of sale.

A driver handover flow for delivery orders, cash collection and restock, connecting the counter to the dispatch module in the ERP.

Key features

At the counter

  • Touch-first sales screen built for a 7-inch or larger tablet
  • Barcode and QR scanning for fast product lookup
  • Cash and card payment flows
  • Receipt printing to a Star TSP100III, plus email receipts
  • Refunds processed against an existing receipt

Shift and cash control

  • Shift open and close with cash drawer reconciliation
  • Pay-in and pay-out tracking
  • Per-user PIN authentication on a shared device
  • End-of-shift sales summaries

Reliability and setup

  • Offline-first — tickets persist locally and sync when the network returns
  • Device hash pairing binds a tablet to one warehouse
  • Driver handover for delivery, cash collection and restock

Outcome

  • Running on tablets at the physical store counter in Mexico.
  • Sells the same catalogue as yoonlab.mx, off the same stock — a sale at the counter and a sale on the web move the same inventory number.
  • Built, signed and released by Rashid LLC, including the Play Store release pipeline.
More work

Other projects

Get in touch

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