Datadog Solution Engineer interview questions

I contacted the technical recruiter directly. Since the beginning the attention and support were extraordinary. There were 4 steps: 2 phone screens (technical recruiter and solutions engineer lead). After that, I finished the technical assignment which took about a week. The technical assignment was all about Datadog's product. I passed the assignment and made it to the onsite interview. I had a phone call with the technical recruiter where I was given information to prepare for the onsite. The onsite interview was 4-5 hours: 1. cultural interview with 2 staff, 2. technical conversation with 2 staff, 3. coding interview with Coderpad, 4. 1:1 with the dept. director. Everything went well; the reviewer of my code test said that I put all the proble logic correctly. They rejected me on the technical. I asked for feedback and the recruiter replied back (very nicely) but did not provide more information/details. Everyone was really nice with me. I'd been great to get feedback about my technical flaws after so much time/effort/travel expenses invested.