We are looking for an experienced and reliable full-stack developer to support the development of a professional POS ecosystem. The system includes multiple variants (Horeca/Restaurant POS, Retail POS, Kiosk Ordering System, Donation Kiosk, and related modules). Our solution combines local and cloud functionality, integrates with various peripherals, and requires a modular architecture for long-term scalability. Your Responsibilities: • Develop and maintain core POS features (orders, payments, printing, kitchen display, reporting, user management). • Build and optimize front-end interfaces for restaurant POS, retail POS, kiosk applications, and admin portal. • Integrate hardware devices such as: – Cashmatic 460 – PAX / Viva.com terminals (A35, A920) – Receipt printers (Epson ESC/POS) – Scales (Bizerba, Elzab, Neptune2, Aclas OS6) – Scanners (Magellan, Honeywell, etc.) • Implement hybrid database logic (local SQLite + cloud API sync). • Support multi-device usage: Windows desktop, Android kiosk terminals, web versions. • Improve stability, performance, and offline-first behavior. • Assist with packaging (Electron build, installers, EXE/APK generation).