We are seeking an expert Wix Velo Developer to implement a responsive, self-service translation quotation system. The goal is to replicate the smooth, dynamic UX of the Gengo/Lionbridge demo while integrating the entire process into the Wix platform (Wix Pay API and Media Manager). Design & User Experience (UX) Reference Primary UX/Flow Reference (Required): https://lionbridge-order.gengo.com/order/... The final solution must adopt the interactive layout, two-column quote summary, and immediate price calculation feedback demonstrated here. Secondary Reference (Layout/Aesthetics): https://hopeforall.tarapharma.co.in/test/ Reference for clean, professional layout and use of input/selector elements. Core Technical Requirements (Wix Velo) The developer must implement the following server-side (Velo Backend) and client-side logic: Dynamic Price Calculation: The total price must be calculated using a multi-factor formula based on user inputs for Word Count, Language Pair, Subject Complexity (e.g., General, Technical), and Service Level (e.g., Basic, Premium). Advanced File Handling: Implement a secure system using Wix Media API to handle multiple document uploads (.pdf, .docx, .txt). CRITICAL: The developer must propose and integrate a backend solution (via an External API or cloud function) for accurate word counting of the uploaded PDF and DOCX files, as Wix Velo lacks native parsing libraries. Payment and Order Flow: The final quote must integrate directly with the Wix Pay API to create a dynamic order item (with the calculated price) and initiate the native Wix checkout process. The final Wix Order record must include all quote details (Word Count, Price, and secure links to the uploaded source files). Required Skills Expert proficiency in Wix Velo (JavaScript/Node.js) for both frontend and backend development. Proven experience with Wix Payment and eCommerce APIs. Strong knowledge of implementing secure external API integrations (HTTP functions) from the Velo backend.