Senior Software Engineer applicants have rated the interview process at OpenProject with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 100% positive. This is according to Glassdoor user ratings.
The first step is the intro interview and after that comes the first technical (really nice structured, we were mostly talking about how to solve different problems). The next step is coding challenge (based on test driven development) and another interview after that.