It's waste of time for this company! The process takes 2 months. First HR call talk about background. Then it's a video technical interview, record your video online and answer technical questions. After that, I was asked to develop a Sudoku game app, it took me 1 week. After I finish the app and send it back. After 2 weeks I get the phone interview invitation, and it was arranged to 2 weeks later. There are several engineers in the phone interview, and focus on some weird questions. For example, what's the benefit of OkHttp? Why do I need to know that? How to protect the data in Shared preference. By using encrypt. In my opinion, it's like a Brain teasers. The whole process is 2 months, I wasted my time to develop a demo.