I was tasked with a case study. Then I was invited to meet with HR, after that I had a meeting with the backend team lead. We mostly went over the case study, other members of the backend team left some notes about the parts that can be improved and interviewer wanted me to respond them. I am kinda sure it was the first time he took a look at the case study. They told me that they would return in a week, but they did not. When I e mailed them after 2 weeks, they told me they chose another candidate. I expect them to return me before I e-mailed them