The first callback was a phone call. I had an introduction to the company and they asked some things about me. First interview round was with HR. It was very chill, though a bit typical and formal for an HR-thing. After some days I received a second email with a technical assessment and a personality test. I had huge workload during these days with my current employer, and had to ask for extension. They happily agreed and gave me 1 more week (the assessment takes 4 days, it's basically an app). I completed both assignments and delivered. One week later I received an automatic email on a Monday morning that they will not proceed with my application, without providing any reasons or feedback.