We have done this for our own organization. This Elysian Trust website (the site you are currently viewing) was custom-coded from scratch in pure HTML, CSS, and JavaScript, with a serverless contact backend, full SEO architecture, dark/light mode, and global CDN deployment. It was designed, built, and live in less than a week. No templates. No page builders. Deployable anywhere.
The same first-principles diagnostic approach that rebuilt our own infrastructure is what we bring to yours.