Userled Senior Software Engineer interview questions

Stage 1 was a 30 minute chat about my prior experience and why Userled specifically which went well. Stage 2 was a 1 hour technical coding session in codeshare where 2 developers watched me code live in a language of my choice. The task was challenging and writing a working solution in the provided time was tricky but I was told that I passed a week after I completed it. Stage 3 and 4 was a 1 hour System Design interview followed by a 45 minute cultural fit / product owner interview. I spent a week and a half researching and preparing then I was told on the morning of the interview not to bother coming in because they had already hired someone and I hadn't passed the technical interview due to a "problem with the system".