2 technical interviews by different engineers in the team. Interviewers with different background will ask you different kind of technical questions which normally you can find on the internet within 2 minutes but they want you to remember all the answers.

Questions needed you to remember many things from a text book. Well, you don't have a text book for smart contract, so they need you to remember non-practical details of Solidity. They also ask questions NOT related to smart contract or Solidity. They obviously don't know how to hire a smart contract engineer.