They wrote me that I am a good match based on my CV and sent me a link to online test (Hackerrank online coding test) which had 2 simple tasks with a time limit of 30 minutes. I wrote the test just fine (I wrote a working code, not necessary best code possible). Then I received email telling me that I am actually not a good match, without any other explanation... I asked for clarification on what was wrong, but they decided not to tell me anythin.