I need a developer to build a custom application for my used car dealership business. The system must include both a mobile app (Android/iPhone) and a desktop application (Windows) that sync with each other without using paid cloud hosting. All data, photos, documents, and forms must sync locally between the mobile app and my computer through a secure connection (Wi-Fi or local network). Mobile App Features Take photos of receipts, driver licence, purchase documents, RWC, invoices, etc. Automatically sync all images and data to the desktop app Fill out transport forms (e.g., PBR form / Purchase Integrity form) Auto-fill forms with car details, business details, and seller/buyer details Create and update purchase & sale entries Store buyer details + uploaded license photo Offline support (syncs when connected to same network) Desktop App Features Dashboard showing: Available stock cars Cars sold Warranty countdown & expiry alerts Profit/GST summary Store purchase details: Purchase price GST paid Transport cost Washing/cleaning Repair costs Rego cost Upload receipt photo Store sale details: Sale price GST payable Buyer information Driver licence photo Warranty start date + automatic expiry Automatic warranty tracker Automatic GST calculator (GST paid vs GST owed) Automatically generate complete PBR / VCR / Integrity forms Export all data to PDF/Excel Everything stored locally on my computer (no monthly hosting fees) Technical Requirements Cross-platform development (Flutter, Electron, .NET MAUI, or similar) Local communication between mobile & desktop (Wi-Fi sync, LAN, QR-pairing) Secure local database (SQLite, local JSON storage, or similar) Simple and clean UI Ability to generate printable forms Preferred Skills Experience building desktop + mobile apps together Experience with offline-first apps Experience with car dealership or inventory apps (bonus) Ability to provide clean, maintainable code Strong communication skills