MubiDokan — Retail POS & Repair Center ERP

MubiDokan is an offline-first desktop POS and business management suite built specifically for mobile phone retailers, electronics shops, and hardware repair centers.

Engineered with Tauri 2, Rust, Next.js, and SQLite, it delivers lightning-fast performance and seamless daily counter operations with zero internet dependency. Features fast counter billing, IMEI/serial-tracked inventory, repair ticketing with diagnostic logs, khata (credit ledger) customer accounting, ESC/POS thermal receipt printing, and hardware device integrations.

Lead Software Engineer responsible for Tauri 2 and Rust desktop integration, SQLite encrypted database modeling, ESC/POS thermal printer driver integration, and React counter UI design.

• Tauri 2 native desktop container providing cross-platform OS bindings with minimal binary size and memory footprint (< 40MB RAM).
• Rust backend managing direct hardware communications: USB barcode readers, ESC/POS thermal printers, and serial ports.
• Local SQLite database engine delivering ACID-compliant transactional persistence with zero cloud latency.
• Next.js and React frontend optimized for keyboard-first cashier shortcuts and instant barcode scanning.
• Khata ledger module tracking customer debit/credit balances with automated receipt generation.

• Rapid Counter Billing: Barcode and IMEI scanning with keyboard shortcuts for instant customer checkout in under 5 seconds.
• IMEI & Serial Inventory: Track device models, warranty status, purchase costs, and sale prices on a per-unit serial number basis.
• Electronics Repair Ticketing: Log incoming repair devices with fault descriptions, estimated costs, assigned technicians, and status stages.
• Khata (Credit Ledger) Accounting: Maintain customer and vendor credit balances with payment history and balance statement generation.
• ESC/POS Thermal Printing: Direct USB/Network thermal printing of customized 58mm and 80mm receipts with store branding.
• Daily Cash Drawer & Profit Analytics: End-of-day cash reconciliation reports showing net revenue, margins, and repair profitability.

• Communicating directly with raw ESC/POS thermal receipt printers over USB and COM ports without requiring third-party print drivers.
• Enforcing atomic inventory transactions so concurrent sales and repair parts consumption never produce negative stock balances.
• Minimizing memory consumption and cold-start times on legacy Windows 7 and 10 POS terminals.

• Successfully built a lightweight, production-grade desktop POS suite running on Windows and Linux.
• Eliminated business downtime caused by retail internet outages through 100% local database operations.
• Sub-second receipt printing and inventory search benchmarked across 20,000+ serial items.