I think that Hackerrank etc are optimising for the wrong question. 98% of the time as a hiring manager I am not looking for a AAA coder - I am looking for an A level coder who fits the team and has other soft skills that matter.
At a certain point "can code" stops being "can write perfromant algorithms" and starts being "can work without direction, can be placed in front of users without fear, can defend their decisions, is not an asshat."
Ten minutes on a shared screen and we can find out if you pass fizzbuzz, can make a rational stab at an algorithm question. After that it's mostly cultural fit.
You cannot automate a test for "is not an asshat" so we get more and more people proving they can get 99% on programming tests when programming tests are 5% of the job.
At a certain point "can code" stops being "can write perfromant algorithms" and starts being "can work without direction, can be placed in front of users without fear, can defend their decisions, is not an asshat."
Ten minutes on a shared screen and we can find out if you pass fizzbuzz, can make a rational stab at an algorithm question. After that it's mostly cultural fit.
You cannot automate a test for "is not an asshat" so we get more and more people proving they can get 99% on programming tests when programming tests are 5% of the job.