Cross-Platform Quotation & Billing App

I'm looking for a skilled developer to create a native mobile app for both Android and iOS platforms. The app is intended for managing quotations and billing, and needs to support user roles: User, Salesperson

Key functionalities include:
- Generate quotations, Invoice, Pi, PO, Debit Note, Credit Note and many more which will be discussed further
- Create and manage invoices
- Track payment status

The app should also integrate with:
- Payment gateways
- CRM systems
- Accounting software

Ideal skills and experience:
- Proficient in native mobile app development for both Android and iOS
- Experience with building secure and efficient payment processing integrations
- Familiarity with CRM and accounting software APIs
- Strong background in UI/UX design to ensure a user-friendly experience

Looking forward to your bids!