Ecommerce / Delivery application

Build a delivery application with a website and mobiles ( Andriod and iOs) for a fully-fledged e-commerce platform. Vendors can come and register on our platform and would be able to sell the products. Delivery boys can register in our app to deliver the products to the customer. The vendor will be provided with a vendor app for order management to accept and reject any orders. The platform should have the option to integrate with any third-party delivery company. Services will be provided to deliver the groceries, meat, fish, fruits and vegetables to the customers. We need websites, mobile app ( iOs and Android) for customers, vendors and delivery teams to successfully deliver the products to the customers. There would be multi-vendors in the platform who will cater to the customer's needs. This application will be launched in the Indian market. The overall timeframe we are looking to launch the application is 4 months. Any company that has built a similar application will be given the first preference as the turnaround time would be quick. We should have a complete order management system, order tracking mechanism, build uploads of the products, product updates, deal sections, offer section, customer communication channel, integration with WhatsApp and all other social media integration. Admin should be able to manage the delivery locations and all apps should integrate automatically with the changes. Delivery slots can be defined in the application based on the speed of the delivery.