Responsive Informational Web App Build

I need a full-stack developer who can turn a straightforward informational concept into a polished, responsive web application. The site will be open to the general public for browsing, while registered users will enjoy additional authenticated features. You are free to choose between a Python (Flask) or Node.js backend, but please keep MongoDB as the data store.

On the front end, I expect clean, semantic HTML, modern CSS for a crisp UI, and JavaScript to keep interactions smooth. The back end should expose well-structured RESTful routes that handle basic authentication along with standard CRUD actions. Whether you pick Flask with Jinja templates or a Node/Express stack with a preferred view layer, the code must remain clear, modular, and fully documented so another developer can step in without confusion.

Responsiveness is non-negotiable; the layout has to look and feel right on phones, tablets, and desktops alike. I will also need simple guidance for deployment—think environment variables, startup scripts, and any hosting nuances—so I can take the finished product live without guesswork.

Deliverables
• Fully functioning web application (public pages + registered user flow)
• Well-commented source code, logically organized into front- and back-end layers
• Step-by-step deployment instructions suitable for a typical cloud host (e.g., Heroku, Render, or a VPS)

I’m committed to meeting agreed deadlines and expect the same in return. If this stack and scope match your skill set, I look forward to seeing how you would approach the build.