I applied for the tech camp tutor role during their recruiting period. They randomly rang me to do a short, quick interview where they asked me questions about what I wrote on my CV and asked 3 technical programming concept questions which were fairly easy. They confirmed over the phone that I would be progressed to an interview at the office in 2 weeks time. I had to prepare 3 presentations, lasting about half an hour to an hour. They give you a pdf of all the information beforehand and further information about the role. After the interview at the head office they tell you straight away whether you've got the job.