I applied online and sent my CV + Cover Letter. After that, I recorded a video interview and managed to pass to the assessment center. The assessment was held at Leuven, Belgium. They refunded for flight, food, accomodation. The day itself was interesting and somehow fun. The assessors were very nice and made us feel at ease throughout the whole process. We had a small breakfast, a brief presentation of the company, business case in groups of 3, business game (2hrs) and face-to-face interview.