POS Application Development Services
We develop custom applications for commercial POS terminals — specifically Sunmi devices. From thermal printer control to foreground services for real-time order processing, we bridge the gap between React Native and native device capabilities with custom native modules.
The Challenge
Commercial POS terminals operate in environments where reliability is non-negotiable. A crashed app means lost orders and revenue. These devices require deep native integration — thermal printers need precise formatting control, the app must run as a foreground service to never miss an incoming order, audio alerts must work reliably for kitchen notifications, and device authentication must be hardware-bound for security. Standard React Native development doesn't cover these requirements — they demand custom native module development and intimate knowledge of device-specific SDKs.
Our Approach
Our POS development approach starts with the Sunmi SDK and works outward. We write custom Java Native Modules that expose device-specific capabilities to React Native, giving us the reliability of native code with the development speed of React Native for business logic and UI. For FoodButik POS, we developed a complete restaurant order management application with ~2,100 lines of custom Java Native Modules. The Sunmi SDK integration covers thermal printer control with custom receipt formatting, Android foreground service for uninterrupted order listening (the app stays active even when the screen is off), and audio notification system for new order alerts. The application implements device-based authentication using Sunmi serial numbers combined with PIN verification, ensuring only authorized terminals can access the system. Redux Toolkit with custom middleware handles real-time order polling, while AutoTask provides automatic order acceptance for high-volume periods. A concurrent action lock mechanism prevents duplicate order processing. The entire system supports 3 languages (managed remotely via i18next + Contentrain CMS), allowing restaurant chains to deploy across different markets without code changes.
Technologies We Use
Key Benefits
Deep Sunmi SDK expertise with proven production deployments. Custom native module development for hardware-specific requirements. Reliability-first architecture — foreground services, crash recovery, and offline fallbacks. Device-based security with hardware-bound authentication. Remote configuration and multi-language support for multi-location deployments. Our POS solutions are designed for the demanding restaurant environment — where every second counts and downtime means lost revenue.
Related Projects
FoodButik POS
Restaurant order management application running on Sunmi commercial POS terminals. Includes ~2,100 lines of custom Java Native Modules for Sunmi SDK integration, thermal printer control, and Android foreground service. Built with React Native CLI, TypeScript, Redux Toolkit, and Java (Sunmi SDK). Features real-time order polling, AutoTask automatic order acceptance, concurrent action lock mechanism, device-based authentication (Sunmi serial number vs PIN), and 3-language support via i18next + Contentrain CMS.
View projectFoodButik
Multi-tenant food ordering platform with a 7-microservice backend system. All architecture decisions, tech stack selection, and implementation were carried out by Lanista Software. Built with NestJS Monorepo, gRPC, RabbitMQ, PostgreSQL, Redis, and Prisma ORM. Features 1 API Gateway + 3 gRPC services + 3 RabbitMQ consumers, ~78 RPC methods, ~80+ REST endpoints, 10-state order lifecycle management, multi-channel notification system (Email/SMS/Push), and 3 different auth mechanisms.
View projectExplore Our Other Services
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