Build a Fast, SEO-Friendly Software E-Commerce Website

I am looking for an experienced web developer to build a modern online store for selling software products and digital software licenses/keys.

Requirements:

- E-commerce website focused mainly on software products and digital licenses/activation keys
- Automatic digital delivery of software keys immediately after successful payment
- Fast, lightweight, and optimized for high performance
- SEO-friendly architecture with clean URLs, metadata, schema markup, sitemap, etc.
- Mobile-friendly and responsive design
- Secure checkout and payment gateway integration
- Customer accounts, order history, invoices, etc.
- Automated email delivery for orders and license keys
- Easy product and order management
- Ability to handle a large number of products and orders
- Proper Google indexing and SEO structure
- Optimized database and caching
- Clean, scalable, and maintainable code

Important:

I do NOT want WordPress. I am fed up with constant WordPress/plugin/theme updates and maintenance.

I want a custom or modern lightweight framework-based solution that is stable, fast, secure, and easy to maintain.

I already have premium/high-level hosting, so hosting resources should not be a limitation.

Developer Requirements:

Please apply only if you have experience building:

- Digital product/software stores
- Automatic license/key delivery systems
- High-performance e-commerce websites
- SEO-optimized websites
- Custom e-commerce solutions without WordPress

Please send me examples of similar websites you have developed, along with the technology/framework you recommend and your estimated cost and timeline.

I am looking for a developer who can build this as a long-term, scalable software marketplace, not just a basic e-commerce website.