I applied through a recruiter. The process took 3 weeks. I interviewed at ooma (Moscow, Moskva) in Nov 2017
Interview
1) Test task (success)
2) Interview with Team Lead (success)
3) Interview with Vice Precident (fail)
I had a lot of experience programming in C ++ and I coped with the test task, but it turned out that they needed a stronger programmer (at step 3)
Interview questions [1]
Question 1
Test task: Repair "damaged" C++ code.
C++ code:
storage/container/library for fast search IP address/mask entry