Rakuten Sr. Software Engineer interview questions

Concurrent data structures, strings, array, tree traversal, class design

1. Codility test had three questions of which one was easy, one was medium and the last was a hard question (Question on battleship). 2. Zoom interview with the developers - One coding exercise (Hard question - https://leetcode.com/problems/word-break-ii/) Then questions on the programming languages I used and some standard backend questions