I received a 30 minute phone call. Salary requirements, previous work experience, etc. I did a 2.5 hour online C++/C#/Game programming test. Lots of pretty tough questions, its designed to be really extensive. That went well, so my next interview was with 2 of the tech team guys. They asked me questions about my favorite games, previous experience, code, projects, what I enjoy, etc. I got asked math questions related to linear algebra, some coding questions, and other things. I then got an HR interview. Mostly about previous work experience, what I know about the company, why ubisoft, etc. I then received the offer via email a few days later.

Introductory call (30 min) Introductory call to learn about your interest and verify they match those of the company. Practical interview (1hr) The practical interview started by me showing some personal video game project. Half of the practical interview was about soft skills. Then we moved to one leet code technical challenge and one video game math related question. If you study/prepare it should be "doable".