I set my LinkedIn profile to open for job opportunities and one of the companys recruiters direct messaged me on the portal. First interview was with the recruiter, where she explained a bit more about the job offering and the company. Call took around 20ish minutes. Second interview was with a director, manager and a supervisor where I was asked more in depth questions about my work experience, mainly technical things. This one took about an hour. Third interview was about 4 days later, prior to that they had given me access to download a tampered with version of their software to install and get some tasks done, the point was to check my troubleshooting techniques and see if I was actually able to get it working, obviously I was not aware of this at the time but it was expected. The call was with the same people from the second interview plus someone from HR. For this one I had to prepare a short presentation with my "findings" as they called it. This one took a bit over an hour and it was on a Friday at the end of day. Tuesday morning I woke up to an email asking me for a short call to discuss the next steps. Wednesday morning I had an offer letter