Interview process was with Hiring manager , and then a case study round with HM & another VP. I don't believe they hired anyone for this role and just took the case study to fix their internal. Case study should only be asked to give to employer if you are really giving an offer otherwise you feel cheated by the company. After receiving the case study , they sent out a rejection email. I heard cases in Bay area where small to mid scale companies are doing this alot by asking candidates to produce material /code and then using it internally and rejecting the candidates.