I would say this company did a good job of wasting my time. round 1, online questions high school math, pre-recorded video interview. round 2, phone interview with HR, brain teasers. round 3, Zoom interview with HR, high school math problems again. round 4, talk with a guy on resume and previous experience round 5, talk with some engineers on resume and previous experience round 6, talk with another engineer on resume again, and previous experience again round 7, talk with the hiring manager, brain teasers.