1) Phone interview with recruiter
2) Take home technical task
3) On-site interview with Head of Engineering and a Machine Learning Engineer
Overall, very pleasant experience. The take home task was among the hardest I've found, but could be accomplished. The face-to-face interview was relaxed, chatting over various questions before moving onto coding on the whiteboard, followed by a chat regarding my CV, and then an opportunity to ask questions. I've a good impression of them and their technical ability given what they have achieved while Facebook and Google are still behind in terms of 3D positioning and mapping.