I applied online. The process took 4 weeks. I interviewed at Cabify (Madrid) in Sep 2019
Interview
They ask you for a data challenge and they give you two weeks to prepare it (because they think you have to invest at least two weekends to solve it). I just invest two days because I was in other selection processes (people have to understand that are you given your free time and it is not infinite), although I sent a pretty complete solution. Not feedback at all. A complete lost of time.
Interview questions [1]
Question 1
Complete a data challenge. Two parts: (1) Airbnb testing one of their features, (2) a randomized experiment and causal modeling.
1. HR Call with Tech recruiter
2. Small Take-home project: programming project + results presentation and conclusions - communication exercice
3. Two technical interviews with team members: general data science, how would you attack this problem?
4. One cultural fit interview with Head of Department
Interview questions [1]
Question 1
What are sources of bias in A/B testing?
How do you ensure A/B tests are not biased?