They've sent me an assignment over an online platform that took around 2 hours. I successfully completed it with a high score. They messaged me and and asked to complete the assignment that I already done a few days ago!! After a while they rejected my application without any specific reason.

I was interviewing for a senior BE role. I had the initial phone screening and then an interview with the CTO and then head of engineering. It was very friendly and I felt comfortable during the whole process. In the end, I didn't get the offer because of a misalignment in the tech stack. Would reapply if there was a role that fit better.