My experience with E-builder was totally humiliating. It is a total waste of time from the beginning of the process. Their approach to testing the abilities of the candidates very irrelevant to what the job requires. They will put you in a room with a guy who barely speaks , and give you this HackerRank challenges to solve. The person will not have any idea about your job function and try to ask irrelevant questions. At the end, you will be judged with your performance on this test questions which is totally irrelevant, and you will kindly let go out of the door.