It was a combination of being the sole decision maker, architect, product manager, etc. without having to coordinate with a team, being very senior (25+ years),

It was a combination of being the sole decision maker, architect, product manager, etc. without having to coordinate with a team, being very senior (25+ years), being a very fast coder (I produced 4x the lines of code of anyone else at the company during my year there), and the fact they only hired jrs other than me straight out of coding camps. They expected code monkeys to write Shakespeare. This was a bank with extreme security requirements that I build in a high sophisticated microservice architecture. My code was easy to read, but the systems were certainly not easy to understand, especially to jrs with zero experience in microservices, Kubernetes, devops at all, etc..