I got a first round writing a backtracking algorithm, and the interviewer had someone who shadowed. The interviewer seemed not confident on the problem itself and was not able to finish the problem.
It was a backtracking problem, LeetCode style.
The following metrics were computed from 2 interview experiences for the Duolingo iOS Engineer role in New York, New York.
Duolingo's interview process for their iOS Engineer roles in New York, New York is extremely selective, failing the vast majority of engineers.
Candidates reported having very negative feelings for Duolingo's iOS Engineer interview process in New York, New York.