I've been promoted to a leading position after renegotiating my contract and it came with a 120% raise. You probably guessed it right - I was heavily underpaid at first. A teammate of mine earned around 60% more than me and our lead over 100%. When I finally found it out I was devastated. It happend for a couple of years. Sounds stupid? Yeah, it was. I was totally unaware of how much I should be asking for in the first place and never cared to talk about the compensation with the other guys. The team being 100% remote and spread across different countries didn't help too.
What would you do in my place? I wanted to quit, but I decided to negotiate an "impossible" raise first as I had nothing to lose anyway. It worked out and I stayed until now.