Omnichannel selling engine and ordering architecture

A method comprising:

• receiving an order from one of multiple ordering channels;
• creating an open check object for the order;
• processing the order using a cloud-based selling engine;
• synchronizing an order state across cloud and in-store systems;
• managing order fulfillment;
• and
• updating an order status across each channel.

A system comprising:

• a cloud-based server including at least one processor and a non-transitory computer-readable medium storing instructions that, when executed by the at least one processor, cause the system to:
• receive orders from multiple ordering channels;
• process orders using an omnichannel cloud selling engine;
• synchronize order data across cloud and in-store systems;
• manage order fulfillment;
• generate digital receipts;
• and
• send order status notifications;
• wherein the omnichannel cloud selling engine includes:
• an open check service for maintaining order state;
• a check calculator for calculating taxes and totals;
• a loyalty orchestrator for managing loyalty rewards;
• a menu validator for validating order items;
• and
• a notification orchestrator for managing customer communications.