I'd love to integrate some sort of salary scale into my job board [1] - this seems difficult since there's no open data for it. Google on it's jobs network show

I'd love to integrate some sort of salary scale into my job board [1] - this seems difficult since there's no open data for it. Google on it's jobs network shows something like "this salary lies on the x%" For this, I'd love if companies shared salary information, or I could parse it from text in a reliable way. Any thoughts? [1] - https://arbeitnow.com/ https://arbeitnow.com/