LINE Backend Engineer Interview Questions
& Process

So the interview process had a few steps. First, there was a coding test that took about 3 hours, and it included 3 LeetCode medium problems, an LRU cache question, and a system design question. Then, before the main interview, I had to do an online algo test within 30 minutes. The interview itself focused on reviewing that test and my background. After that, there was an online culture fit test. Finally, there was an HR call. I didn't pass the culture fit test.

I applied for the Fukuoka office. The first part was a 3-hour online coding test with 4 general data structure and algorithm questions like leetcode, and one small system design question that had minimal requirements. The next part was a 1-hour online assessment followed by a 2-hour video interview with 2 backend engineers and an interpreter. The assessment had 6 questions on basic backend dev knowledge and one on evaluating the time complexity of search algorithms. The video interview was kind of a mess. The interpreter didn't know tech stuff and couldn't translate well. I only saw one interviewer, the other one was hidden. The worst part was they were interviewing me for a backend monitoring job, not the backend developer job I applied for. They asked me 'what command would you use if the system went down?' without any context, and when I asked for clarification, they just repeated the question. I didn't get an offer, but I wouldn't have taken it anyway. The engineers didn't seem passionate about their jobs.

I applied through a recruiter. The first interview will involve a coding test and the second interview will focus on programming concept questions. The interviewer will then discuss your answers after you complete the test.