Stellar Development Foundation Software Engineer interview questions

Pretty standard interview process consisting of screening, architecture / system design and behavioral. Handled well for the most part, albeit with some red flags in between rounds (nothing crazy though). Then towards the very very end, the tone really changed to become much more adversarial and it became apparent the team was looking for a way to NOT move forward despite what seemed like a good outcome so far. Totally ok in terms of their final decision being negative; definitely not ok to interview like that, though. Would not recommend.

Was reached out to by one of the recruiters who then connected me to the hiring manager. 1hr phone screen by recruiting manager. Was told there would be 4 rounds, one of which was initial phone screen. Second round was 1 hr coding challenge with 3 questions.