How are Golang and Node.js related when developing a backend?

Question

go

Hello!
I recently started learning Golang, and noticed that in most of the vacancies for it, knowledge of Node.js is also indicated among the requirements, despite the fact that both of them, as far as I can tell, are quite self-sufficient for writing the server side.
How do they interact when writing an application? Which parts are written in Node and which parts are written in Golang (and why)?

Answer 1

The fact is that now many companies are rewriting performance-critical parts in Go and, basically, old systems are written in Node.js.
Plus, prototyping new products is easier on Node, and then you can switch to Go.

Answer 2

I want to add to Philipp 's comment that the Node is used for front assemblies. So now the requirements of PHP + Node are quite real.

Answer 3

that in most of the vacancies for it, knowledge of Node.js is also indicated among the requirements

All employers dream that their employees own 100,500 technologies and do not ask for a salary increase for this.
These are just employers' dreams.
As for the mandatory knowledge of Node.JS and Go at the same time, these are the dreams of INDIVIDUAL employers.
None IN MOST is not observed.
Another thing is that it will always be useful for a programmer to know and be able to do more than just his current job requires.