I applied online.

• Homework assignment: I liked the overall exercise and learned some things overall. I would recommend doing it for yourself first, because depending on the interview team, they could want different things. For example, they could ask why you split the exercise into multiple files and not a singular file, which is just weird by itself.
• HR interview: There was nothing special. We talked about yourself, your path, and what you have played around with in crypto.
• Technical interview: I signed an NDA, but it was mostly related to testing, hashing, and how Bitcoin works. Overall, I would say the technical interview is weak in general, but because of the questions they asked, they don't tell much about you as a software engineer. Interviews are subjective by themselves, of course, but for me, the interviewers looked cocky and more privileged because they are in crypto than people you would enjoy working with. You won't receive feedback on why you were declined.

How do Bitcoin transactions work?