Started with HR interview, about 30 minutes. Then I received home assignment which included one coding task - writing two functions to empirically solve a statistics (I don't think it is beneficial to reveal the precise question) problem. In addition, there was an unorthodox yet pleasant personal writing task (no code, no programming, actual writing). After that I was invited to an on-site technical interview, which took about 3 hours, in which I was given two tasks - one related to caching, the other one related to concurrency management. Then there was an additional technical yet more abstract interview, which unfortunately i did not pass.