I applied online. I interviewed at Nethermind (London, England) in Jan 2022
Interview
Firstly, I described my background and experience. Then I was asked a couple questions on formal semantics of programing languages, several on my understanding of blockchain and cryptography. Lastly, I was given a take-home assignment to do it in 8 hours (it wasn't hard since it didn't go beyond the scope of Software Foundations book)
Interview questions [1]
Question 1
What is a small step semantics of a program language?