I applied online. The process took 3 weeks. I interviewed at Deliveroo (London, England) in Feb 2022
Interview
1. HR screen (30 mins)
2. Tech screen + case study (45 mins)
3. Take home
4. Final rounds
- Case study
- SQL
- Behavioral
- Presentation of the take-home
Positives:
- The internal recruiter was super helpful and polite and really seemed to care about helping you succeed.
- The majority of interviewers were very engaged and passionate.
- Interview guide was really nice and clearly laid out all steps.
- They give you feedback.
Negatives:
- The guidelines for the take-home of "no more than 4 hours of effort" is completely unrealistic if you actually want the job.
- Two interviewers were unprepared, one didn't read my CV and another started giving a behavioral interview when it should have been the take-home presentation.
Both case studies + the take-home asked about A/B testing.
Case study 1: Should we offer a rider bonus of $1 to each long distance order?
Case study 2: Should we show riders the tip before they accept the order?
Ask questions, discuss metrics, design the experiment, etc.
- Tell me about a time when you had to persuade someone that what you were working on was important?
- Tell me about a time where you faced conflicting perspectives on an issue?
HR call, then technical call with one data scientist about past projects and why Deliveroo, after that a take home test and 4 rounds of interviews: SQL, case study, cultural fit & take home test presentation
Interview questions [1]
Question 1
Why Deliveroo? and minimal unit of randomisation in A/B testing.
Straight forward process but very long and arduous with plenty of stages. I'd say it needs to be refined. Interviewers were very professional and rapport building was easy. I would suggest cutting down on the numerous steps in the interview
Very long process, 6 interviews and a take home task before being rejected. Brief of the task said don't overcomplicate it but the feedback I received was that I still didn't go into enough detail. So be prepared to spend a lot of time for the interviews. Generally friendly interviewers and easy interview questions, very straight forward standard a/b testing and causal inference questions. Despite this was rejected, would have brushed up on my domain knowledge in retrospect as I probably wasn't very clear answering causal inference questions to a product very different to my experience. The sql test was very easy and I completed all questions correctly, but got some negative feedback on this as I wasn't familiar with postgresql quirks around dates which they marked me down on.
Interview questions [1]
Question 1
standard a/b testing and causal inference questions