Input Output Software Engineer Scala interview questions

I've applied online, got contacted by the recruiter about a month after the application. (the application had a required field to enter the salary expectation) - 1st stage was an interview with the recruiter, general questions about my motivation to join the company, and experience with the technologies that were listed in the job description. - 2nd was a technical assignment, I was given 1 week to complete it. The assignment was in scala and required basic knowledge of PoW blockchain. -3rd was an interview with 2 potential team members, they've given some details about the project, and ask questions regarding scala, and given some hypothetical task, how would I implement and test the feature, in detail. As I later found out, the questions were based on what I've written in my CV. -4th stage was an interview with team lead, we mainly talked about the project. -5th I was asked to give 2 references from 2 previous employees, without them, we could not proceed to the next stage. -6th was an interview with 2 HRs, they have again, asked me about my motivation to join the company, my experience throughout the interview, I had an opportunity to ask some questions as well. This was a basic culture fit interview I felt like. Then I've got the offer. the process in total took about 1.5 - 2 months.