Hackerrank, the best tool to hire third world engineers!
I think Hackerrank as the interviewing platform is the best marketing gimmick ever. For prescreening, candidates mostly remember solutions to the problems they've seen before (or shared by a good brother or sister from their own town or same third world country). They will mostly type solutions from their memories. We see plagiarism alerts all over the place and have to ignore them. 99%+ candidates have plagiarism alerts on their work.
For live coding, candidates mostly look up solutions on their phones while buying time with interviewers. I usually can sense it, but don't have enough evidence to call them out.
Instead of hiring the best engineers, we're hiring the best cheaters and plagiarizers from the third world. All while paying money to the people who want to turn American engineering and hiring practices into Indian engineering and hiring practices. With the red hot job market, I think candidates with honor should boycott Hackerrank, and refuse to interview if Hackerrank is used. Companies as the hiring orgs must find another way to find the next best engineers other than being lazy and paying for the Hackerrank snake oil.