In my first job as a developer after a few months I removed a few kloc of messy code/configuration written by consultants and replaced it with a few hundred lin

In my first job as a developer after a few months I removed a few kloc of messy code/configuration written by consultants and replaced it with a few hundred lines of easier-to-understand code in a more mainstream technology. No features lost. I also got the libraries upgraded (they were waiting for months for a release for some support library that turned out to be unneccessary with newer releases of the main libraries.)