1st step was to take a Codility test, where I got a good, but not perfect score. They've sent me an email explaining that I could take another attempt with the same link to improve my score AND that my current attempt would not count, with a hint about the algorithm, which I could use. After investigating the topic a bit I've managed to find the perfect solution and scored 100%. 2nd step was a generic interview with an engineer about my expectations, experience and approach, where I've presented business and goal oriented approach with focus on the code quality - basically what every senior developer who's serious about the business knows and does. The interviewer was professional and seemed rational. A couple of days later I've received an email with a rejection and no feedback. Not even a word, despite perfectly fitting their job (or actually being overqualified).