redvulps

next step is to create a UEFI TUI using react (please don't)

Well, I've been using React Native for mobile development for 3 months and everything is working well, the platform specific code can be easily written with a simple if statement or, of course, the same way as you do on Xamarin, it's up to you

Even being javascript in the end, you still can access all the native stuff with ReactBridge without any headache in the case you have some specific functionality that you might and haven't found in the lots of available packages out there :)

I had this scenario(or at least close to it) on the company that I've worked before. We had a nodejs/angular frontend and all the backend were spread across multiple api(each api was a microservice).

It does scale very well, considering that all the microservices are written in ruby.

And for the SEO thing, there was a varnish server before the frontend server that sends bots request to a custom prerender server ( https://github.com/prerender/prerender ).

So basically, normal users were redirected to the nodejs app, and google and others crawlers were redirected to prerender.

I dunno exactly if this is what you want to get with "also provides a server-side render", but I guess it's close to what you're looking for :)