Thoughtworks Software Developer interview questions

Two rounds of coding. 20 minutes each. They shortlisted students based on that. Out of 340 students, 16 made it. 2 rounds of technical interview, at campus. Then the next day, two other rounds of technical interview at Gurgaon office and then two HR interview.

1st coding problem for 2 hrs followed by pairing round in which Thoughworkers will pair with you and review the code, throw changing requirements. Mainly,cleanness, design, flexibility of the code is tested. I solved the given problem within a given time. Pair programming round did not go well. I am confident about my design. But interviewer was not convinced with my design, and gave negative feedback. I was told that the HR team is very pragmatic, and the candidate has an option to ask for review from another interviewer. I asked HR to get the code reviewed by other interviewer, as I am pretty much confident about my performance. The HR team told, be patient, we will ask some other interviewed to review the code. 3 weeks passed, but HR did not reply to neither of my email.