Modern Minimalist osCommerce 4 Theme Development

I’m launching a new online store on osCommerce 4 and need a developer/designer to create a clean, professional, and unmistakably modern/minimalist theme. The theme must integrate seamlessly with a standard osC4 installation and support all core flows: User registration/login Product search Category and sub‑category navigation Product detail pages Add‑to‑cart functionality Checkout process Requirements: Fully responsive design, optimized for mobile, tablet, and desktop Fast loading and smooth rendering across major browsers (Chrome, Firefox, Safari, Edge) Code must be modular, well‑commented, and upgrade‑safe (no core osC4 overwrites) Built using Twig templates, SCSS/CSS, and JavaScript Modern, minimalist aesthetic with clear typography and ample whitespace Must pass Google Lighthouse mobile usability checks Deliverables: Complete osCommerce 4 theme folder (Twig templates, SCSS/CSS, JS, assets) Installation/read‑me instructions for easy activation Dummy data or screenshots demonstrating all key flows (login, search, navigation, product view, cart, checkout) Design source files (Figma, PSD, or Sketch) for future tweaks Preferred Skills: PHP JavaScript CSS/SCSS HTML osCommerce theming experience Figma/Photoshop for design assets Strong background in responsive web design Nice to Have: Prior experience with e‑commerce platforms (osCommerce, Shopify, WooCommerce, Magento, etc.) Portfolio of modern, minimalist themes How to Apply: Please share: Relevant experience with osCommerce or similar e‑commerce theming projects Links/screenshots of past work that demonstrate clean, modern design A brief outline of your approach to ensuring responsiveness and upgrade‑safe code Looking forward to collaborating and getting this store looking sharp!