The HR person on Atlassian was amazing, very responsive, very friendly, helped a lot and answered all questions I had. I had 3 interviews: - A design challenge: where I chatted with a Atlassian engineer and we went through an application and how to deploy it on AWS, it was great, the engineer feedback was also great. - Python challenge and - Systems (Linux) challenge: Both of those interviews were really weird, very basic questions, questions that don't relate to a Senior position, I went to the interview expecting to discuss some complex technical questions, describe my experience, and situations I had worked on. But the questions were so basic, like what a top command does, what is swap. It felt like I was doing a 2nd semester of a Computer Science school test. Atlassian seems to be a great company, I just suggest that you focus on what they will exactly ask for the interview, instead on focusing on your actual experience, maybe re-read the Operational Systems book from your Computer Science degree :|