Very extensive procedure incl phone interview, 3(!) on site interviews, personality test, assesment & assesment presentation. The procedure is not very clear. Although I passed through every round I got rejected on information that was clearly available in my resume and cover letter. Basicly, Optiver could have saved me hours of preparing, taking days off and lots of stress. I was dissapointed I did not get the job as all the interviews were very upbeat and the staff I had my talks with were friendly and professional.