They do a thorough technica test. Prepare for questions about yourself, your self-introduction, your work-life balance, how you were able to know about their company, your reason for deciding to apply at their company, what are your strengths, being able to watch their orientation video (found on the site after the interview via Skype), SWOT analysis of yourself as a business English teacher, YNK questions, mock lesson with demo material/s. Also, understand the 5 areas that the company teaches according to the video on their company website (recruitment video different from orientation video).