As part of an interview I did recently I was asked to build a web app that mimicked a part of their service and deploy it somewhere for them to view. I probably

As part of an interview I did recently I was asked to build a web app that mimicked a part of their service and deploy it somewhere for them to view. I probably spent about 15-20 hours on it in total and I believe I did more than what the brief asked for only to be told I did not get the job with no explanation, even after I asked if they had any feedback. I thing is I don't think anybody even looked at what I made because to view everything in the app required the user to login (part of their brief) but no new users showed up on the site at any point. Pretty frustrating experience overall.