The process of application was divided into following stages: 1. phone (CV screen) 2. technical interview (HackerRank, data structures) 3. on-site interview They invited me to go to London after 2nd stage. However, 4 days before my trip (they forgot about time difference, so they called me at 5am!) they ask for one more interview <?>, which was planned 2 days before the planning trip (actually a little bit more than 1 day taking into consideration the flight departure). The second interview (optimisation, algorithms) was pretty difficult and clearly just to eliminate a candidate. Pretty rough, but still very unprofessional. On top of that, the following morning, I got mail if they can call me, I responded within 60 seconds that yes please call me, was waiting for their call for 30 mins, and eventually I got automatically generated message they my application is not processing any further. Without any feedback. Hard to plan your university deadlines/meetings/assignments with such organization.