Fintech

Financial technology engineering

PoS, ERP modules, financial analytics, trading tools, monitoring, backup planning, and eCommerce — six areas with a detail page for each.

PoS · Shift open · Receipt 2.1s · Offline mode
PoS systemsRetail & hospitality

Point-of-sale for shops that need to keep selling

Register software and back-office reporting — roles, catalog, payments, reconciliation, and end-of-day reports. MiniBook3 is our offline shop register with installers for Linux, Windows, and macOS.

What we deliver

  • Cloud, on-prem, and hybrid register software
  • Linux, Windows, and macOS packaging with guided installers
  • Payment terminal and cash-drawer integrations
  • Hybrid offline queues and multi-store reporting

Stack: React · TypeScript · Python · PyWebview · SQLite · PyInstaller

Explore MiniBook3
Zolo · 20 categories · PayPal · PayHere · Seller payouts
Fintech / eCommerceMarketplaces

Marketplaces and payments

Single-seller stores and multi-vendor marketplaces with PayHere and PayPal — checkout webhooks, seller flows, and order admin. Zolo is our multi-seller marketplace (20 categories, pre-launch QA).

What we deliver

  • Marketplace seller onboarding and inventory isolation
  • PayHere, PayPal, and custom payment gateway integrations
  • Client eCommerce storefronts (Monday, Zolo, and custom builds)
  • Catalog, search, checkout, and fulfillment patterns for production traffic

Stack: React · Python / FastAPI · PostgreSQL · PayHere · PayPal · GCP

Explore Zolo marketplace

Fintech capabilities

Commerce building blocks.

Payment integrations

PayHere checkout · PayPal payouts · Sandbox validation

Hybrid PoS

On-prem · Offline queues · USB peripherals

Inventory & reporting

Real-time stock · Shift reports · Multi-location

FAQ

PoS, commerce, and finance questions

What is a POS system and do I really need one?
A point-of-sale (PoS) system records sales, taxes, stock movements, and payments at the counter. If you still rely on notebooks or generic spreadsheets at busy hours, a dedicated PoS reduces errors and speeds checkout. Zolestio builds custom PoS and ships MiniBook3 for shops that need a reliable on-device register.
Do I need cloud-based or on-premise POS?
Cloud PoS suits multi-location sync when the internet is stable. On-premise (or hybrid offline) keeps selling when connectivity drops. MiniBook3 is designed as an offline-first shop register; we also engineer cloud and hybrid PoS when your network and ops model require it.
Can I use my own payment terminal with a POS system?
Often yes — it depends on the terminal protocol and certification path. We integrate payment terminals, drawers, and printers when the hardware vendor exposes a supported interface, and we design fallback cash/card flows for retail and hospitality.
How much does a POS system actually cost?
Cost splits into software (license or custom build), hardware, payment fees, training, and support. Packaged products like MiniBook3 have clear subscription packages; custom PoS is scoped from your catalog, locations, and integrations. Contact us for a project estimate within one business day.
What features should I look for in a POS system?
Prioritize offline reliability, roles/permissions, tax-correct receipts, inventory, shift/Z-report reconciliation, and clear exports. Nice-to-haves (loyalty, kitchen displays) only matter after the register never blocks sales. We help you separate must-haves from later phases.
How do I choose the right ecommerce software for my business?
Match the platform to catalog size, single vs multi-seller, payment rails (PayHere, PayPal, others), and fulfillment. Template stores work for simple catalogs; marketplaces and custom checkout need engineered seller isolation, webhooks, and admin. Zolestio builds storefronts and multi-vendor systems such as Zolo.
How do I know if my business really needs an ERP system?
If finance, inventory, purchasing, and operations live in disconnected tools and reconciliation eats every week, ERP (or focused modules) starts to pay for itself. Small teams can begin with inventory + finance modules rather than a full suite. We design modules that connect to your PoS and payment data.
Should I buy ERP / financial software or use spreadsheets?
Spreadsheets are fine until concurrent edits, audit trails, and inventory accuracy break. Dedicated systems add permissions, history, and integrations. Cloud vs on-premise depends on compliance, latency, and who runs infrastructure — we implement both patterns and migrate data carefully.

Scope a fintech project

Contact us with your product type, payment integrations, and target platforms. An engineer replies within one business day.

Case studies

MiniBook3, Zolo, Monday, and client deliveries.

View work

All services

Fintech, operations, engagement.

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