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Lex Laboratory / Projects / Mostrana

Mostrana

What if checking out at the corner store felt as clear as the best app?

A point of sale designed for Mexican retail: sales, stock and payments in a clear, legible interface. Currently under construction.

In development Point of sale for Mexican retail
No public site yet. ▶ Try it here

How it was built

  • 2days of building
  • 19commits
  • ~74Klines of code
  • 182automated tests
  • 1platformsWeb (PWA offline)

First commit September 24, 2026 → Last commit September 25, 2026

Languages

Share of the in-house code by language.
  • TypeScript98.9%
  • Other1.1%

Try it here

Not a video: a working miniature of the product. Tap it, play it and open it full size.

Highlights

  • Laravel 12 + Next.js 16 monorepo
  • Identity and design system focused on legibility
  • Real-time sale, checkout and stock flow

Role

Product, brand and architecture

Stack

Next.js 16 + React 19Turborepo + pnpm monorepoTanStack Query + Zustandreact-hook-form + ZodTailwind CSS 4 + Radix UI + motionSerwist + DexieLaravel 12 APIStripe subscriptions; Vitest + Playwright + Pest

Log

  1. Mostrana: your counter, in orderThe lab's point of sale for Mexican retail now has a name, a brand and a plan.
  2. Mostrana can now ring up salesA touch point of sale with cash, card, transfer and store credit, printed tickets and offline mode.