Glideapps website based on gsheet data

Hi, I am looking for an experienced Glide Apps developer to build a secure customer portal for my logistics business based on an existing Google Sheet. I need this done quickly and efficiently. ​Project Scope & Workflow: ​Public Landing Page & Info: ​A professional public landing page featuring our logo, hero section, images, "About Us", and company info. ​Clear options to either "Log In" or "Register". ​Custom User Registration Workflow: ​New users can register with their Email and must select a Country from a dropdown menu (the country options are pulled from a specific Google Sheet tab). ​Unique Code Generation: Upon registration, the system must automatically generate a unique client code for the user. It must combine the country code with 3 unique letters/numbers that haven't been assigned yet (e.g., ES-ABC if they selected Spain). Note: You can solve this via Glide Columns or a quick Google Apps Script in the Sheet. ​This registration data (Email, Country, Unique Code) must be saved into a "User Registration" tab in the Google Sheet. ​Protected User Area (After Login): ​Profile Management: Users can fill out/update their full address data and manage/change their password. Updated address data must be saved along with their email and unique code. ​Logistics Dashboard: Users can view their order details and shipment history. ​Data Security (Crucial): Shipments must be automatically matched and filtered based on the user's Unique Code or Email. Client A must NEVER see data from Client B (Strict Row Owners / Secure Filtering required). ​What I will provide: ​Access to the structured Google Sheet (including the Countries tab). ​Company logo, texts, and images for the landing page. ​Your Profile: ​Expert with Glide Apps / Glide Pages. ​Experience with custom registration workflows and generating unique IDs/codes (Glide logic or Google Sheets Scripts). ​Strong understanding of Glide data security (Row Owners). ​Budget: $100 (Fixed Price) Timeline: Ready to start immediately. Please show 1-2 examples of previous Glide portals you built.