I applied in-person. I interviewed at Scape Technologies (London, England)
Interview
HR skype interview -> Coding test -> Research head skype interview -> CTO skype interview
Basically, they need to know you have some background about local descriptor, image matching, camera localization or 3d reconstruction. Team player is also important.
Interview questions [1]
Question 1
Coding test contains interpolation, hash table, and complexity estimation for the algorithm you used.