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Screener and then on-site. The screener was difficult to understand and wasn't very helpful when it came to discussing the problem. The mock interview did help to prepare, though. Didn't make it past the first round.

This is a pretty extensive process. Some preparation is required even for the initial screening with HR, as there will be some deep questions about previous experience. For the tech interviews, algorithms knowledge and complexity analysis are a must

The first stage was a coding assignment with 4 questions and a questionnaire about the areas I would like to work in. Subsequently, I was called for the coding interview, where I had to solve 2 data structure problems in 45 minutes.