Android POS App & Website Development

I need an experienced developer to create an Android POS application and a website. The app and website should include:

- Billing
- Stock management
- Udhari (credit) management
- Gst report

The ideal freelancer should have:
- Proven experience in mobile app development, specifically for Android
- Strong web development skills
- Experience in building POS systems
- Knowledge of inventory and credit management systems
- Ability to integrate seamless billing processes

Please share your portfolio and relevant experience.
I need a complete business management app that includes:

✅ Android Mobile App (APK)
✅ Web Dashboard (for laptop/browser access)
✅ Product Management (name, photo, GST, barcode)
✅ Stock In/Out + Low stock alert
✅ Billing with GST & PDF invoice
✅ Customer Udhaari system with balance auto calculate
✅ Customer record (name, phone, address)
✅ Barcode/QR scanner using phone camera
✅ Reports (sale, purchase, profit, GST, udhaari)
✅ Admin login (mobile + web)
✅ Local data or Google sync
✅ Source Code required
✅ 3-month free bug support

Budget: low budget (Flexible for good quality)

Note: Hindi-English mix UI preferred. If you have any demo, share please.