[strken]

This is a very minor nitpick, but saying you need a specific technology is part of the problem, even if it's a really good and appropriately-complicated technology like postgres.

90% of the time, you need whatever technology your company already uses, or your team already knows, that solves the problem.

If your company already uses .NET and SQL Server, you probably don't need node.js and postgres. If your company already uses PHP and sqlite, you still might not need postgres, unless there's an identifiable reason to switch.