Front-End Developer — Interactive Multi-Step Survey Form (HTML/CSS/JS) for Wix Website

We need a front-end developer to build an interactive, multi-step survey/application form for a music academy website built on Wix. The form is fully designed — you'll be implementing a completed mockup into production-ready code. **The Project: The form is a 15-screen "one question per page" application survey (similar to a Typeform-style flow). It includes: A hero/landing screen with branded messaging 7 question screens (mix of single-select, multi-select, and open-ended text inputs) 2 interstitial/social proof screens An animated loading screen A summary/review screen A contact information screen (name, email, phone) A final booking screen that must integrate with the existing Wix Bookings widget **Technical Requirements: Self-contained HTML/CSS/JavaScript — no frameworks required (vanilla JS is fine, or lightweight like Alpine.js) Must be embeddable into a Wix site via Wix's HTML Embed element (iframe) or Velo Must be fully responsive (mobile-first) — the majority of our traffic is mobile Must integrate with Wix Bookings (NOT Calendly) for the final scheduling step — the calendar should pull real availability and prevent double-booking Must support per-step analytics tracking (Google Analytics 4 custom events) — we need to track exactly which screen each user reaches and where they drop off Must support A/B testing infrastructure (ability to serve two variants of the form and track conversion by variant) Must capture and store all survey responses (submission to a backend, email notification, or Wix Collections — open to your recommendation on the best approach within Wix) **Design Assets Provided: Complete visual mockup of all 15 screens (clickable prototype) Brand style guide (colors, fonts, logo) All question copy and interstitial messaging The existing Wix booking widget to integrate with ***What We Need From You: Production-ready, responsive HTML/CSS/JS code for all screens Wix Bookings integration for the final scheduling step Google Analytics 4 event tracking setup for per-step funnel analysis A/B test capability (simple URL parameter or cookie-based split) Form submission handling (where the data goes when someone completes the survey) Brief documentation on how to update questions, swap interstitial content, and manage A/B variants going forward ***To Apply: Please share: Examples of interactive forms, surveys, or multi-step flows you've built Any experience working within Wix (HTML embed, Velo, Wix Bookings API) Your approach to analytics tracking and A/B testing in an embedded context Estimated timeline and fixed-price quote **Budget: Open to discussion based on scope — please provide your estimate.