First email arrived 1 day after I sent my resume. It was a pre-test with 3 basic questions (Fibonacci, combinatorial algorithms) and other questions related to background and skills. This pre-test was to complete within 1 week. Shortly after (~2 days), I was sent a RemoteInterview challenge. The test was to be completed in 60 minutes; 12 questions (1-8 backend related, 9-12 mobile related) which were quite broad. Next day I was notified of the result, and scheduled first technical interview through Skype. The first technical interview revolves around the answers given in the 60min test (in fact, they will read the test replies during the interview for the first time). There were 2 server-side developers (probably seniors) and 1 translator. Questions were quite basic and simple, but very broad (e.g. "have you ever developed a multithreaded app?", "do multithreaded apps run on all CPU cores? differences between different languages", "talk me about quicksort", "what is a GC? how does it work? which GC strategy uses Java? which Python?). The interview lasted 2 hours, and I was allowed to ask questions at the end of it. Though I did quite bad at this interview (c'mon, quicksort worst case, it's been 4 years since I last studied it) I was asked of a second interview ~30mins after this interview. Second interview was with another server-side developer (probably manager). It was very pleasant and we talked about past experiences, problems and solutions adopted. I was, then, asked to design a distributed system given some preconditions on traffic and infrastructure (which I failed, I think). Next day I was notified of the rejection of my application. Overall, the interview should be pretty simple to those who get to study (again) the questions asked in the 60min test. Though the application was for "+1yr professional experience" engineers, they want experienced engineers in Java. They seem to care A LOT about GC theory, tunings, memory leak prevention and debugging, and non-blocking /asynchronous I/O.

I applied through their online portal and I got a response a day after my application. First was a pre-test that compose of some programming and background questions. It was to be completed within a week. The programming questions are language agnostic but you might get issues when implementing it to find the result for the follow up questions. Next is an online test composing of 12 questions to be completed within 1 hour. You have a freedom when to take it but again you should take it within a week. There are programming questions, mostly on Android/iOS, but majority are CS concepts questions like Big O of this sorting or this search, difference between blocking and nonblocking I/O, etc. You are not required to answer them all but it is better if you have refreshed yourself with those CS concepts before taking the test. After the online test, they will email you regarding schedule of technical interview. The technical interview will basically expound your answers on the online test. There are two japanese(?) engineers, one came late, and a translator. My experience in this tech interview has raised a lot of red flags in this company. For all the questions, it seems they are trying to find faults on what you know because they tend to jump from one concept to another until you landed on a concept you aren't that familiar. It could be they are just testing you or there are lapses in the translation but some questions, imo, aren't necessary. Weeks after the tech interview, I got the rejection email. I think I am more relieved that I got rejected because thinking of my experience in the interview, I am not sure I would want to work for their company. I highly regard the formality in Japan yet how they handled the interview is very informal. One interviewer came late, they tend to talk on the background as if they aren't interviewing someone, they are even laughing at some point.