One the biggest challenges I am facing with a colleague I hired (I was not the hiring manager but technically it was my say finally) is their communication skills. They find it really hard to explain a problem to others. They also do not listen properly or adequately and it is not malicious at all. I did not consider communication as a deciding factor at least to some extent. Lessons learnt.

Also, I have been focussing a lot more on “coding” problems (as in that whiteboard thingie) because that is what I guessed asked whenever I interview. I am going to work on that as well. That, while shows candidate can solve that coding challenge, is more of a GRE - GRE shows the person is good at taking GRE and may not necessarily be good at english, maths or reasoning at all.