Build Interactive Landing Page with Game Mechanic | React + Leaderboard

We're looking for an experienced frontend developer to build an interactive gamified landing page for our brand campaign. The page should run instantly in any mobile or desktop browser — no app, no download required. What we need: - Single interactive game mechanic embedded in a landing page (spin-the-wheel, scratch card, memory match, or simple arcade mechanic) - Score/reward counter + progress indicator with smooth UI feedback - Leaderboard or results tracking (Node.js + PostgreSQL backend) - Lead capture form integrated with the mechanic (email/phone before reveal) - Shareable results screen with score, badge, and CTA to main offer - Mobile-first responsive layout, optimized for paid traffic landing pages Technical requirements: - React + JavaScript/TypeScript frontend - Smooth animations — Framer Motion, GSAP, or Three.js for visual effects - HTML5 Canvas or WebGL for the interactive mechanic if needed - Node.js backend for leaderboard/lead API - UX/UI design expertise - PostgreSQL database - API integration with CRM or email marketing tools (Mailchimp, HubSpot, etc.) -Hosted and playable via URL You must include: -- Links to interactive landing pages, gamified web experiences, or branded mini-games you've shipped -- Your approach to conversion-focused UX and engagement mechanic design -- Experience with A/B testing or CRO on interactive pages, if any -- Fixed price and timeline