GST Ready Billing Software (Similar to Vyapar / My Bill Book)

I am looking for an experienced developer/team to build a GST Ready Billing Software for my clients. The software should be user-friendly, secure, and suitable for small to medium businesses in India.

Key Features Required:

Easy Invoice & Billing (GST compliant)

Quotation / Estimate generation

Customer & Supplier Management

Product / Inventory Management

Purchase & Expense Tracking

GST Reports (GSTR-1, GSTR-2, GSTR-3B, etc.)

Profit & Loss, Balance Sheet, and other basic reports

Barcode support (optional but preferred)

Multiple User / Role-based Access

Backup & Restore option

Online/Offline usability

Admin Control: Ability to give or restrict access to specific clients for any feature.

Sub-Admin Control: Option to add multiple sub-admins with customized permissions (feature-wise access control).


Platform Preference:

Web-based (accessible via browser) OR

Cross-platform (Windows Desktop + Android app)


Other Requirements:

Clean & modern UI/UX

Fast and lightweight

Easy to use for non-technical users

Secure login & data protection


Reference Apps:

Vyapar

My Bill Book


Deliverables:

Full source code

Documentation (setup + user guide)

Basic training on usage


Budget & Timeline:
Please share your best quote with estimated delivery time.