Reached out by recruiter. Interviewed with two senior engineers in the first round. They were very friendly. Asked about basic DSP theorem and project experiences. Didn't get any response after two weeks.

Stages I experienced 1) Short phone talk with the recruiter 2) Technical interview of around 30 minutes with an engineer 3) Whole-day technical interview with 5-6 engineers I got an email saying they were moving with another candidate without feedback. Even though the interview process starts with an email stating, "We thought you would be a great match for their open position," I found it rude that they did not provide feedback or any reason for the rejection after I devoted so much time to an interview.