Curl.tech Senior Software Engineer interview questions

I got interviwed at curl which involved 4 rounds, 1st screening round 2nd code Assignment 3rd Technical round 4th Managerial round Code Assignment was in dotnet core and angular, which I had completed with all the things like file upload, token authentication and role based Authentication with excel processing as they asked in Assignment but still they didn't selected. Company need to respect the effort of the candidate who took his time to complete the task.