Obsidian app with it's latest "bases" feature (or Dataview plugin) would work nicely for this.

For sure. Or Bear, or Notion, or ...

There are a lot of things to track all this. I personally didn't want to spend more than the minimum time setting up and using the system, because last think I wanted was to get nerdsniped into inventing a job application tracking systems instead of, like, applying for jobs. That would've been a real risk to me.