I applied online and got a phone interview scheduled by HR the next day. Other than generic questions (career goals, why QT etc. ) she asked me to list some basic Unix commands used for system monitoring. An interview was scheduled the next day with the team lead and the director of support. The interview was very stressful. I was interrupted all the time. I am not sure if this was an arbitrary attempt to see how candidates function under stress or a reflection of stress within the team. After quite challenging questions on Unix and system architecture they asked me about different situation I could encounter when doing support and what will be my course of actions. I was also asked basic SQL and domain questions. Financial questions: what is a GTC order, how do you lower an order priority on an exchange. I got an email the following week saying that they picked another candidate but I am encouraged to keep applying as they have lots of staff turnover. I am not surprised why.