First there was a phone call with someone from the team (not techy) - which was fine. After that there was a phone call with someone a developer which was also fine.

However, the take home coding challenge was a joke. It requires you to install software, mess about with configuring your environment until it suits Circle etc. It's like your first day at a new job but literally no help being given and don't forget you're not getting paid for your time of course. After you spend days setting up your environment and dealing with software you've never dealt with before I made it to the on site interview which I thought went perfectly.

It then took them around a month to give me a no. Be very careful about wasting your time interviewing here in their Dublin office.

How would you prevent the same transaction going through multiple times?