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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
Now by default, Vite doesn't do SSR. One way to do Vite+SSR is to use vite-plugin-ssr. You can scaffold an example project that does SSR based on some dynamic data:
If you want a simple React setup where the boilerplate code isn't hidden from you, you don't want Next.js, but a slicker setup. You can use for example Vite: in development mode it's a very fast development server and in production mode it bundles your code for production and disappears. And it doesn't hide from you the internals, like Next.js does, so I think it's more what your senior has in mind. See here what the React documentation says about it: