Android App to automate the business process

Hi, we are looking for proper android app developer and our high level requirement is as below 1. Customer management 2. Vendor management 3. Walkin customer 4. products (dairy products) with different vendor and brand declaration 5. Order management 6. stock management 7. delivery management and tracking 8. subscription management for customers (daily delivery of milk). 9. dealer management with profit sharing and etc. 10. we collect customers and pin to dealers and these customer need lesser profit sharing with the customer. 11. invoicing the delivered stock and sms and email to respective dealer or customer. 12. sales leads added to the app and later to convert to customer 13. sales appointments. 14. customers are given option to buy any other product and add to monthly payment as part of the subscription payment. 15. management to add order on behalf of customer, if some customer call and order. 16. customer based on location, automatic pinning recommendation for the management to nearest dealer. 17. delivery person coordinator need to be able to manage multiple delivery persons and each delivery person has to take photo and it shoudl be pinned with date and time and upload to ZOHO doc. 18. and etc.