I just spent five years in a mature startup where I could see a tangible connection with the customers and my impact on thier lives (low fee fintech for unbanked). It was laid back and family like enough to be fun but without the drama of real family. Lots of good times.
Since that ended I landed in a very good job (huge Corp) with rediculous pay but I can't see any connection to any real customer and our projects aren't even mentioned in the business impact. I'm relied on to design and build tech and teams but I am not fulfilled. Same as yourself I guess.
I miss being plugged into the business and seeing my impact on customers lives. There is zero family like atmosphere, no joking around or healthy level of hanging-out at all.