Chartio Solutions Engineer interview questions

Set up by a recruiter who reached out. First, an initial interview with hiring manager. Second, interview to test data skills and understanding. Third, 3 consecutive 1:1 interviews (~2 hours total + prep beforehand with recruiter). All of this was remote due to COVID. Then radio silence for over a week. After follow up, get generic decline. No feedback, no follow-up response from Chartio. It's a shame that they didn't operate with the basic levels of professionalism, especially since they were nice and smart people to talk to. If I would have got through the panel interview, it would likely have been one final conversation the following week.