Ask HN: How to choose between Scala and Node.js for a new project?

I am having confusion between technology stack for my next personal project. I have decided with React+redux for front end and PostgreSQL as database Now I have to decide the backend stack for rest apis My options are Playframework(Scala) or Hapi(node) I already completed projects using Playfarmework(java) and Hapi. Which one is better if we need to refactor into micro services in future? I read articles regarding pros and cons of static vs dynamic typing and code refactoring I never maintained any project for long time, are you seeing any advantage with scala over nodejs in back end in long time?