Roku

Recently, I interviewed at Roku for the Senior Software Engineer (Backend) role. I’m sharing my experience in the hope that it helps others who are preparing. > Note: The interview process at Roku seems quite unpredictable. Until you’re actually in the interview, you may not know what type of round it will be — it could be DSA, LLD, or HLD. Round 1 Focused on Java internals (primarily around concurrency and thread safety) along with a DSA problem in the LeetCode Medium/Hard range. Round 2 Again covered Java internals, followed by a Low-Level Design (LLD) question. The emphasis was on writing production-grade code, with special attention to concurrency handling and thread safety. Round 3 A System Design round focused on designing a scalable backend system.