Node Js have worked incredible great for me on every project I had. It is fast enough to support big and small apps, you do not have to worry about performance, because it is very capable of building a big REST API.

One advantage is that the learning curve is lower when you have used javascript on web browser as frontend, so, it is easy to migrate from Frontend to Backend with node.

Node Package Manager (NPM) has an incredible amount of packages from many developers, so you can use them on your project as you need them.

Code is easy to support, way different than Java Legacy code.