Enterprise Mobile Cashier App Development for Betting Retail Networks(NDA)
FinanceA FinTech mobile app case study for cashier workflow automation: PIN operations, offline transactions, ESC/POS receipt printing, multi-region configuration, and Protobuf backend integration.
About the Project
FinTech / Betting / Gaming Industry • iOS, Android • Mobile App
A mobile app for betting shop cashiers — a cross-platform solution designed to automate cashier operations at retail locations connected to a betting platform.
The client is a betting operator with a distributed retail network across several regions. The platform provides the infrastructure for managing player balances through a PIN-based system and required reliable offline-capable tools for cashiers.
Client: betting platform (NDA)
Project geography: USA, Kazakhstan, Latin America
Delivery timeline: ~3.5 months
Status: Production
Primary system users:
- • Cashiers at betting retail locations
- • Cash collection operators
Goal
Business objective:
Automate cashier workflows at retail locations and replace paper-based processes with a digital mobile solution integrated with the bookmaker’s existing backend platform.
Project goals:
- Build a cross-platform mobile app for iOS and Android
- Implement the full PIN workflow: issuance, top-up, and redemption
- Integrate receipt printing via ESC/POS printers
- Support multi-region deployment and multilingual UI
- Implement reporting and transaction history
- Set up push notifications and an in-app auto-update system
- Ensure stable operation under unreliable internet connectivity
Expected outcome: a production-ready mobile application prepared for rollout across new regions and retail locations.
Solution
We developed a cross-platform mobile cashier application for betting shops using React Native. The app is integrated with the client’s backend through a binary Protobuf protocol and supports two operating modes, receipt printing, offline functionality, multilingual UI, and centralized reporting.
The app was optimized for high-frequency daily cashier operations and is used on both smartphones and tablets.
Core Functionality
Authentication and Access
- Username and password sign-in
- Personal cashier PIN setup
- Cashier-to-terminal assignment
PIN Operations
- PIN creation for customers
- Balance top-up
- Balance redemption
- Validation of limits and transaction amounts
Operating Modes
- Pinsale — a simplified mode focused on PIN-based operations only
- Direct — direct balance top-up without using a PIN
Reporting and Control
- Cashier transaction history for the last 24 hours
- Daily transaction reports
- Cash collection reports
- Terminal and device management
Receipt Printing
- Automatic receipt printing
- ESC/POS printer support
- Duplicate receipt protection
- Caching of printed transaction data
Additional Features
- Player bonus management
- Copying transaction data to clipboard
- Push notifications for system events
Architecture and Technical Highlights
- Cross-platform application (iOS / Android)
- MobX for state management
- Modular screen architecture
- Protobuf for backend communication
- Data caching and offline support
- Service-oriented architecture
- Support for multi-region configurations
UX/UI
- Custom UI tailored to cashier workflows
- Large controls for fast input
- Error minimization in money-related operations
- Dark mode support
- Adapted for smartphones and tablets
- Interface designed for intensive shift-based work
Security and Reliability
- Secure authentication via backend API
- PIN validation before every transaction
- Validation of minimum and maximum limits
- Terminal lock capability when required
- Protection against repeated transactions and duplicate receipts
- Offline mode support for unstable internet environments
Challenges and Complexity
Key project challenges:
- Working with a binary Protobuf API instead of REST
- Supporting multiple ESC/POS printer models
- Implementing APK auto-updates outside Google Play
- Multi-region support with different currencies, languages, and business rules
- Reliable offline operation
- Dynamic multilingual support (6+ languages)
How we solved them:
- Built abstraction layers for working with Protobuf
- Implemented a universal receipt printing layer
- Added an application auto-update system
- Designed a configuration model for regional deployments
- Implemented resilient offline logic and caching
Project Team
Development team:
- •Project Manager
- •Mobile Developer
- •Backend Developer (integration)
- •QA Engineer
Client-side team:
- •Product Owner
- •Backend team
Tech Stack
Mobile
Integrations and APIs
Data Storage
Results
Outcome:
- Production-ready mobile application
- Rolled out across 3 regions
- Used in real-world retail locations
Key metrics:
3
Deployment regions
6+
Interface languages
2
Operating modes
Business impact:
- End-to-end automation of cashier workflows
- Fewer operational errors
- Faster customer service at retail points
- Centralized reporting
- Ready for expansion into new markets
Status: the application has been deployed and is actively used in production.
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