And by "tweaks" he means overhauling the entire thing for the 100th time

Have you ever been in a situation where you're assigned to a new project, check the codebase and start wondering you've really made a good choice becoming a developer?

"We follow the AGILE methodology."

A fancy way to say :
- We mostly work on tight deadlines.
- We will come with last second changes.
- We have little/no overtime payement policies.
- We will ask you to do basically anything even if you said explicitly that you don't know how to do it.