Online Ordering app using Flutter

I need to make mobile application using(Flutter) to make an ordering app, It will allow employee to make an online order to get their (coffee,tea etc) items without wasting thier time to move for collection these Items, The app will be for multi companies so we need to make the employees enter firstly the name of their company then if It’s correct the employee will insert the username/password to login and start to use the app, That means the project will be Multitenant with a smalll dashboard to manage somethings like items and creating an account for companies and their employees.