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Case Study Industry: Restaurant & Hospitality

Custom POS System for a National QSR Franchise

Key Business Outcomes

$620,000 Saved

Annually in credit card processing fees by escaping SaaS lock-in.

100% Offline Uptime

Stores can operate flawlessly, print tickets, and queue payments without internet.

Hardware Freedom

Saved $150,000 in hardware refresh costs by running the app on generic iPads instead of proprietary terminals.

The Challenge

A rapidly expanding Quick Service Restaurant (QSR) franchise with 40 locations was bleeding revenue due to their reliance on a legacy SaaS POS provider (Toast).

Their primary issue was payment processor lock-in: the SaaS provider forced them to use their proprietary credit card processing, taking a massive 2.9% + $0.30 cut of every transaction. Across 40 high-volume stores, this amounted to hundreds of thousands of dollars in lost margin annually. Furthermore, the stores experienced frequent internet outages; when the cloud POS went offline, the kitchen printers stopped working, forcing the staff to write tickets on paper and halting credit card processing entirely.

Our Technical Solution

Vanavya Tech engineered a completely Custom, Hardware-Agnostic POS System, handing total software ownership back to the franchise.

To solve the payment lock-in, we integrated the custom POS directly with Adyen via their terminal API. Because the franchise now owned the software, they were able to negotiate interchange-plus pricing directly with the bank, instantly dropping their processing fees to 1.5%.

To solve the internet outages, we built a Local-First Architecture. We developed a native iPad application using SQLite as a local database. The iPads communicate directly with the Epson kitchen printers over the store's local network (LAN). If the internet cable is literally cut, the POS continues to take orders, print to the kitchen, and securely cache encrypted credit card authorizations locally, syncing them to the cloud the moment the internet returns.

System Architecture

graph TD; subgraph Store Local Network A[iPad POS (React Native)] -->|LAN / Offline| B[(SQLite Local DB)]; A -->|LAN Socket| C[Epson Kitchen Printer]; A -->|Adyen Terminal API| D[Credit Card Reader]; end A -.->|Internet Restored / Sync| E[Node.js Cloud API]; E --> F[(PostgreSQL Central DB)]; F --> G[HQ Analytics Dashboard];

Technical FAQs

Is it PCI compliant to store credit cards offline?

We do not store raw credit card numbers. We utilize Point-to-Point Encryption (P2PE) hardware readers. The credit card reader encrypts the card data and sends a secure "token" to our POS software. We safely store this token offline; when the internet returns, the token is sent to the bank for final settlement. Raw card data never touches the iPad.

How does corporate HQ update the menu across all 40 stores?

We built a central HQ Cloud Dashboard. A regional manager can upload a new seasonal burger, set the price, and click "Publish." The central server sends a push notification to all 40 iPads, which instantly pull down the new menu database in the background without interrupting the cashiers.