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... (Budget: $30 - $250 USD, Jobs: Angular, AngularJS, API Development, Database Management, HTML, Invoicing, JavaScript, PHP, Vue.js, Web Development)