TripleLift Software Engineer interview questions

I was contacted via HR agency. The response took more than 3 weeks, and was postponed. The interview itself was easy, and I was able to answer both algorithmic questions in time. The interviewer seemed distracted and barely looked at my answers. After that I got a response from HR that I didn't pass. Looked like waste of time and they didn't really need anyone.

First there was a coding screen, where you had to build something using standard web dev tools. Then there were 2 phone interviews, one technical, one non-technical. Lastly, there was an on-site interview, which consisted of 3 individual interviews. The 3 individual interviews were with 2 engineers and a senior engineer. They were all really friendly.