Google Cloud Invoicing & WhatsApp Sharing

I need a cloud-hosted invoicing system built natively on Google Cloud that lets me create, track, and share invoices with both suppliers and buyers, and then roll everything straight into a live balance-sheet view.

Core workflow
• Suppliers and buyers must each have their own profile pages where I can store contracts, payment terms, and past invoices.
• Every invoice should automatically update a balance sheet that I can filter by date, counter-party, or currency.
• From any invoice screen I want a one-click “Share on WhatsApp” button that sends a nicely formatted PDF (and a link) to the chosen contact.

Tech expectations
Use native Google Cloud services where it makes sense—Firestore or Cloud SQL for data, Cloud Run or App Engine for the backend, and maybe Firebase Authentication for user roles. The UI can be React, Angular, or Vue; I’m flexible as long as it’s responsive and fast.

Deliverables
1. Source code in a private Git repo
2. Deployed demo on my Google Cloud project
3. API documentation and a short video walkthrough
4. Post-launch support for bug fixes (30 days)

I value clean, well-commented code and clear communication throughout the build. If this sounds like your kind of project, tell me how you’d architect it and include links to similar systems you’ve delivered.

My budget for this task is $50,