Custom E-Commerce Site for Digital Goods

I need a professionally designed, fully responsive e-commerce website dedicated to selling digital products only—think downloadable files such as e-books, templates, or software keys. Because the store must be custom-built rather than relying on Shopify or WooCommerce, it should be tailored end-to-end to my brand, conversion flow, and future feature ideas.

Beyond clean UI/UX, the site has to handle secure user accounts, instant file delivery after payment, license-key generation (if needed), and an intuitive admin dashboard where I can upload new products, track sales, and issue refunds. Integrations with Stripe and PayPal are a must, and I’d like the codebase to be easy to maintain—modern stacks such as Laravel, Node/Express, or a lightweight Python framework all work for me if you can justify the choice.

Deliverables I will review for acceptance:
• Pixel-perfect responsive front-end (desktop, tablet, mobile)
• Custom shopping cart, checkout, and payment gateway integration
• Automated secure download or key-delivery system
• Admin panel with product, order, and customer management
• Clear documentation and handover of source code

If you’ve shipped custom digital-goods stores before, show me a couple of live links or screenshots alongside a brief outline of your proposed tech stack and timeline.