Lots of tests, programming not too bad, lots of brain teasers and games. Programming was 3 hacker rank questions. Also tested reaction time, probability, and sequences. Games were a little bit tedious.

Online Assessments: to complete a series of online assessments, which may include: Mental Arithmetic Test: Assesses speed and accuracy in basic calculations. Practicing mental math can significantly improve performance. Neuro-Assessment Games: A set of short games designed to evaluate cognitive abilities. The entire assessment takes about 60 minutes. Numerical Reasoning Test: Measures the ability to interpret and analyze numerical data. Candidates have 25 minutes to complete this test. Probability Assessment: Evaluates understanding of probability theory, with a 15-minute time limit. HR Interview Successful candidates proceed to a virtual interview with a member of the recruitment team. This conversation focuses on your background, motivations, and cultural fit with Optiver. It's an opportunity to discuss your experiences and ask questions about the company. Technical Interview

The whole process is pretty standardized. including the online test, hr interview and trader interview. It's really hard to prepare all different perspectives of the interview, need to know the details of the resume and why you want to join Optiver