The whole process was tough. Two code algorithms were presented that I had never seen before on LeetCode or elsewhere.

At last, there was a System Design interview. All the projects I wrote on my resume are about backend development. However, during the design interview, the interviewer kept asking me questions about all kinds of frontend UI problems. I told him I don't have much frontend experience, but he ignored it and continued asking questions.

Another engineer also participated in the interview, but she was just a shadow. Even though she suggested, "Maybe we can skip this frontend part and ask some system scale-related problems," my interviewer still insisted on finishing all his frontend questions.

Finally, he left me around 10 minutes to talk about system scalability, availability, consistency, databases, etc., but he seemed uninterested.

I totally doubt why I applied for a backend position and am now being interviewed by a frontend engineer.

javascript, css, html, UI, etc.