API Architect/Developer for new Cloud-based SaaS Point of Sale Software

Looking for an experienced API developer/architect to architect and develop an API for a new cloud-based SaaS point of sale software to be used for the bar/restaurant industry. The API will be utilized from a web app and a mobile app and needs to be scalable for future additions such as adding an AI/ML layer. High-level Requirements: Cash Management Online Ordering (Pickup and Delivery) Customer Management Staff Management Inventory Management Multiple Location Management Reporting & Analytics (Real-time) Gift Cards & Loyalty Promotions/Price Scheduling Tracked Activity Logs Other Integrations -- Cash Drawer -- Barcode Scanner -- Label Printer -- Weight Scale Some existing systems to use as a guide: [login to view URL] [login to view URL] Feel free to ask any questions you may have to clarify the requirements or the product we are trying to build. We are open to various technology stacks and will rely on the developer to suggest a tech stack for the API. You will be asked to answer the following questions when submitting a proposal: [login to view URL] tell me about your a SaaS application you worked on and how many customers it had? [login to view URL] you worked on any type of POS system before? [login to view URL] technologies would you use and why? [login to view URL] security measures will you take to make sure the API to make sure the API is secure? [login to view URL] you have any questions about the job description?