Applied online and was sent an automated email asking me to complete an online assessment. As part of the online assessment, the software used generates test cases in a read-only file. You have to pass all of the tests in order to progress to the next level. I passed 2/4 levels quickly but for the 3rd level, the read-only test cases failed to build. I was using Golang and the test case (clearly generated by AI) had code for "variable := []undefined{}" which is not valid Golang. There was no way for me to edit this test code since it was read-only and provided by the platform. I reported this feedback to the platform itself but because I was never contacted by a recruiter, I could not tell Anthropic that the platform had an error that prevented me from completing the assignment. As a result, I received a low score on the assessment (since there was no way to pass the level if the test code did not build) and I received an rejection from Anthropic a few days later from a no-reply email. This was a really frustrating experience.