RevenueCat.

In their words

• Evolution of a role as a Founder CTO Miguel Carranza, co-founder and CTO of RevenueCat, maps how his job changed over three years: from shipping the MVP with a team of five after Y Combinator, to stopping coding entirely as the team reached 19 across six time zones. His view is that a founder CTO should do whatever has the most impact at each stage, not what they enjoy most.