Phone screen, online code test, technical interview. Prepared based on Glassdoor information on concurrency. It was not in the interview at all. Interviewers were detached and seemed bored. They did not provide a positive impression of the work environment. Specialised algorithm question was not really useful for determining ability for this role.

1. Online hackerrank problem, not leetcode style, more like a simulation problem, difficulty: medium; 2. 4 rounds technical interview, focus on: C++(STL, low-level optimization, etc), networking; 3. Final round with HR and CTO, behaviour questions.