signs you're too good of a programmer -

you use monads in object-oriented languages (like Python)

instead of the standard library, you get your algorithms from PDF's you have to pay a journal access fee for.

you believe in good test coverage: so do the ten thousand people who have downloaded your test suite from github.

you leave comments highlighting incorrect behavior... by the standard compiler.

you don't always formally verify that your program is optimal- sometimes you only formally verify correctness.

you're a full-stack developer, but wrote some of the layers yourself.

investors want to meet the rest of the team