Interviews were challenging and different than your casual interview but very fun to tackle since they're more startup-y questions of your everyday actions, problem solving and solutions , you could use the internet in them as well so it felt like an actual challenge you'd face while working and the interviewers are very friendly and smart with follow up questions.
First interview was HR, This includes your estimated salary, expectations, the company and a couple of introduction questions so they get to know you and you know more about the company. She gives various insights about the company as well while at it.
second is coding assessment, basically finishing a task within a time limit of 60 min or so. you can use google, or any tool to complete it, it was challenging to do overall within the time limit but the interviewer made it a very fun experience overall especially when some bugs came out in the last 15 min.
then architecture & devops interview, the interviewer is very knowledgeable with it so the he would mostly drive you to the edge of your capabilities and follow up on your decisions and why you made them that way and your view on services and what to use / not use in certain situations and certain architecture designs.
Finally a culture fit (90-120 min) with the head of CS, CTO and tech lead. lots of questions about how you deal with every day flow and what you do in certain situations and "seniority test" questions and ending with a couple of technical coding questions then an office tour. The questions themselves were more of like a conversation between the three and me but the technical ones at the end were not expected, I'd suggest to eat well before this interview since you would need energy for the last technical questions too :)
Unfortunately, got rejected for not being senior enough for the position (senior backend engineer) but very encouraged to re-apply in a year or so.