Similar to the previous reviewer. The interview process was overall positive but I'm not going to mark my experience with them as positive because the outcome was negative (not because I did not get an offer). They have a code test that mimics their work. I submitted my at least decent code test which, as they emphasized, focused on writing quality code and not the geometry aspect. Their review of my code was positive (the parts that actually matter for being part of their team) but they faulted me for a trivial (from my point of view but major from their point of view) geometry 'mistake' that would have been impossible for me to get unless I knew the details of their business. The funny thing is my code gave numerically correct answers to their test cases. With this 'mistake', my rather high qualifications were promptly dismissed. Heck it would have been ok if they 'discounted' my qualification to the job because of this 'mistake' but they went ahead and just dismissed me. For this ridiculousness, they get a NEGATIVE from me. FYI, this position(s) has been open for the better part of a year as far as I know..so maybe more. They are willing to wait months until someone gets through their process. While the skills required are rare, it shouldn't be this difficult for them to get qualified people. I can see why they wait months at a time.