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      Senior Machine Learning Engineer Interview

      13 Oct 2022
      Anonymous interview candidate
      London, England
      No offer
      Neutral experience
      Easy interview

      Application

      I applied through a recruiter. The process took 1 week. I interviewed at Deliveroo (London, England) in Oct 2022

      Interview

      It was meant to be in three stages but I didnt pass the first stage as the interviewer felt he didnt get enough signal during the interview. The first stage used to be just project discussion but python and engineering questions have now been added which was not communicated to me prior to the interview. I mentioned that to the interviewer who apologised but still evaluates my responses.

      Interview questions [12]

      Question 1

      In three tiers: - Project questions: Project questions (Based on your project) What algorithm could be used to fit data to memory when training logistic regression?
      1 Answer

      Question 2

      Describe the algorithm mentioned above
      1 Answer

      Question 3

      What is term frequency in tf-idf?
      1 Answer

      Question 4

      Python Questions: What is the difference between list and tuple?
      1 Answer

      Question 5

      What is the algorithm underlining dictionary
      1 Answer

      Question 6

      what data type cant be used as key in a dictionary?
      1 Answer

      Question 7

      What problem could occur is an empty list is used as default argument to a python function
      1 Answer

      Question 8

      What is the difference between Python class and instance variables
      1 Answer

      Question 9

      What is inheritance and give an example
      1 Answer

      Question 10

      What is Super and how is it used?
      1 Answer

      Question 11

      Engineering Questions: What is Dockerfile, image and container?
      1 Answer

      Question 12

      What is the difference between Vertical and Horizontal Scaling?
      1 Answer

      Other Senior Machine Learning Engineer interview reviews for Deliveroo

      Senior Machine Learning Engineer Interview

      12 Jul 2024
      Anonymous employee
      Hyderābād
      Accepted offer
      Positive experience
      Average interview

      Application

      I applied through a recruiter. The process took 4 weeks. I interviewed at Deliveroo (Hyderābād) in Jun 2024

      Interview

      The interview process is different from the typical processes where the judgement is based on solving a hard problem. Here the assessments are based on practical knowledge and skills. There were 5 rounds: screening, assessment, ML theory, ML system design, and behavioural.

      Interview questions [4]

      Question 1

      Screening: Questions about current projects, python, neural networks.
      Answer question

      Question 2

      ML Theory: Tested theoretical knowledge and core basics of Machine Learning. Topics on logistic regression, different types of loss functions, bias, variance, neural networks, regularisation and its usage.
      Answer question

      Question 3

      ML Practical: Design a system for fraud detection (when the customer is fraudulent).
      Answer question

      Question 4

      Assessment: 3 parts involving coding, code review, and creating a design doc for a problem (estimate order processing time).
      Answer question

      Senior Machine Learning Engineer Interview

      19 Apr 2022
      Anonymous interview candidate
      London, England
      No offer
      Positive experience
      Average interview

      Application

      I applied online. The process took 4 weeks. I interviewed at Deliveroo (London, England) in Mar 2022

      Interview

      It was one of the best interview experience for me Recruiter was friendly and actually rooting for your success. Interviewers were knowledgeable, very professional and interesting to connect with. But the best thing about the interview was timely and detailed feedbacks between the interviews and at the end too There were total of 5 rounds (excluding recruiter screening) - Tech Screening [ELIMINATION ROUND] : It was chat about my past projects, why i took an approach for a project and some quick technical questions around that - Assignment Round [ELIMINATION ROUND]: Got a regression task to be completed in 24 - 48 hours Got feedback on first 2 rounds ONSITE ML theory round : This was the round i got the no in. I have mentioned few of the questions asked in Q/A section. ML practical round: It was more like a case study round where i was asked how would i help CRM team in detecting fraudulent tickets raised by customers. Behavioural and Business Acumen Round: Again i have mentioned major theme of questions in Q/A section and as the name goes this round revolves around behavioural aspects and its just my hypothesis but this round also plays a role in determining which role level you will be end up getting offer for. I haven't mentioned much about rounds here as Deliveroo has done a brilliant job in mentioned about it on their website.

      Interview questions [4]

      Question 1

      How Logistic regression minimises its loss function ?
      1 Answer

      Question 2

      What is Regularisation ? How it works ? Why is it needed
      Answer question

      Question 3

      How imbalanced data causes issue in Classification ? How is it handled ? What are the evaluation metrics for such scenario ? Which one to choose and why ?
      Answer question

      Question 4

      Have you mentored anybody in the past ? If yes, How [Explain and further why questions on that ] How did you adjust yourself for mentoring someone? Did you have experience where you r mentoring didn't work for you and if yes, what did you do that in scenario ?
      Answer question
      2
      avatar
      Deliveroo response
      4y
      Thank you so much for taking the time to write such an extensive review. I'm sorry it didn't go further this time, but hopefully we will have an opportunity to cross paths in the future.

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