Modular monolith over microservices
One deployable app with clear internal modules keeps infrastructure simple and costs low while the product grows.
Pyalm Books: a multi-tenant accounting and POS SaaS we build and operate
A multi-tenant SaaS for invoicing, VAT, inventory, and point of sale, built as a modular monolith and operated by Pyalm.
UAE & IndiaVisit Pyalm Books
The challenge
What needed solving.
Small businesses in the UAE and India need compliant invoicing, inventory, and POS without enterprise pricing — and every business's data must stay isolated in a shared platform.
What we built- POS terminal with barcode search, cart, and multi-tender checkout
- Inventory with variants, suppliers, stock adjustments, and purchase orders
- Sales history, receipts, CRM-lite, and reporting dashboards
- Role-based access (Owner, Admin, Manager, Cashier) with email invitations
- Organisation-level isolation enforced on every query
- Web app plus an Android app
Shared schema with tenant isolation
Every record carries an organisation id and every query is scoped to it — the most cost-effective tenancy model for thousands of small accounts.
The result
Pyalm Books is live as a web and Android product — and the same architecture patterns are what we bring to client SaaS builds.
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