After I applied this position online, I was contacted by a recruiter on the phone one day later. She asked some basic questions about my background and projects mentioned in my resume. Then she sent me a code exercise. I got an on-site interview after two days I sent my answer to her. On-site interview is not so difficult. They are really knowledgable and friendly. They introduced the technologies they use and asked about object oriented design, and how to design a high performance and low latency system. I am really glad to be part of such a nice team. The whole interview process is professional and efficient.