Machine Learning Engineer Interviews

Machine Learning Engineer Interview Questions

Companies rely on machine learning engineers to help design and improve the systems that allow their software to improve on its own, rather than being specifically programmed. During the interview process, be prepared to be tested heavily on both computer science and data science knowledge with an emphasis on recognizing patterns and trends. A bachelor's degree in computer science or a related field will be required.

Top Machine Learning Engineer Interview Questions & How to Answer

Question 1

Question #1: What are the most important algorithms, programming terms, and theories to understand as a machine learning engineer?

How to answer
How to answer: Be prepared to talk about things like Type I and Type II errors, supervised and unsupervised machine learning, ROC curves, and other key parts of machine learning. Employers want to know you have a strong knowledge of the technical aspects of the job position.
Question 2

Question #2: How would you explain machine learning to someone who doesn't understand it?

How to answer
How to answer: Sometimes machine learning engineers have to work with people who aren't familiar with the technical aspects of the job. Use this interview question as an opportunity to show your strong knowledge of the position and your communication abilities.
Question 3

Question #3: How do you stay up to date with the latest news and trends in machine learning?

How to answer
How to answer: By talking about how you're up to date with the latest news and trends in machine learning, you can show an employer that you're engaged in the industry, a skilled researcher, and self-motivated.

8,212 machine learning engineer interview questions shared by candidates

I was given an engineering interview roadmap that will be outlined below verbatim: Recruiter phone screen (30 mins)-This is a chance for your recruiter to learn about your background and interests, what you are passionate about, and the impact you want to make in your next move. Technical phone screen (60 mins) - You will meet with an Affirm Engineer to further assess your technical skills through a live pair-programming session. Onsite - Practical coding (60 mins) - Like the technical phone screen, the practical coding session is intended to give us an opportunity to assess your coding ability, and other themes such as readability and decomposition. You should not expect to be doing heavy algorithmic questions. Instead, the questions we will work on together will be cross-cutting across a backend focus while still evaluating your general technical skill. Platform-specific questions may be asked depending on the context of the role. Onsite - Systems design (60 mins) -We will work through various technical problems that can be solved in a myriad of ways by defining the architecture, modules, interfaces and data that comprise a system. As part of the exercise, you may be asked to whiteboard some simple code or pseudocode to help illustrate your design Onsite - Hiring manager (60 mins) - this interview with the hiring manager will explore your background and skills. This interview will also give you the opportunity to ask questions about the team, projects you would be working on, and learn more about Affirm. Additionally, expect questions around contributing to Affirm’s culture of inclusion, working effectively with a global team and for prospective managers, your ability to ensure all team members are seen and heard equitably. Lastly, be prepared to share your experience with mentoring or leading all or part of a recent project. Offer - Congratulations, you made it! Your recruiter will schedule time with you to discuss offer details and talk through next steps.
avatar

Machine Learning Engineer

Interviewed at Affirm

4
Feb 3, 2025

I was given an engineering interview roadmap that will be outlined below verbatim: Recruiter phone screen (30 mins)-This is a chance for your recruiter to learn about your background and interests, what you are passionate about, and the impact you want to make in your next move. Technical phone screen (60 mins) - You will meet with an Affirm Engineer to further assess your technical skills through a live pair-programming session. Onsite - Practical coding (60 mins) - Like the technical phone screen, the practical coding session is intended to give us an opportunity to assess your coding ability, and other themes such as readability and decomposition. You should not expect to be doing heavy algorithmic questions. Instead, the questions we will work on together will be cross-cutting across a backend focus while still evaluating your general technical skill. Platform-specific questions may be asked depending on the context of the role. Onsite - Systems design (60 mins) -We will work through various technical problems that can be solved in a myriad of ways by defining the architecture, modules, interfaces and data that comprise a system. As part of the exercise, you may be asked to whiteboard some simple code or pseudocode to help illustrate your design Onsite - Hiring manager (60 mins) - this interview with the hiring manager will explore your background and skills. This interview will also give you the opportunity to ask questions about the team, projects you would be working on, and learn more about Affirm. Additionally, expect questions around contributing to Affirm’s culture of inclusion, working effectively with a global team and for prospective managers, your ability to ensure all team members are seen and heard equitably. Lastly, be prepared to share your experience with mentoring or leading all or part of a recent project. Offer - Congratulations, you made it! Your recruiter will schedule time with you to discuss offer details and talk through next steps.

You will be asked a wide range of ML-related questions (ML theory, PyTorch, CNNs, etc.). You will also be asked to code towards the end of the 1 hour session (Leetcode medium). Most of these questions have well-defined answers (e.g., how do you disable gradient computation in PyTorch) while others are more open-ended (e.g., how would you use unlabeled data to boost the performance of your supervised tasks). My major complaints are with these open-ended questions. The interviewer had specific answers in mind and would not understand/accept alternative approaches. The depth of the interviewer's ML knowledge is also questionable as the interviewer did not understand how pretrained networks can be used as feature extractors. The interviewer also asked about variational auto-encoder without knowing the underlying probabilistic formulation. Overall, a negative experience.
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Machine Learning Scientist

Interviewed at Varian Medical Systems

3.9
Dec 28, 2021

You will be asked a wide range of ML-related questions (ML theory, PyTorch, CNNs, etc.). You will also be asked to code towards the end of the 1 hour session (Leetcode medium). Most of these questions have well-defined answers (e.g., how do you disable gradient computation in PyTorch) while others are more open-ended (e.g., how would you use unlabeled data to boost the performance of your supervised tasks). My major complaints are with these open-ended questions. The interviewer had specific answers in mind and would not understand/accept alternative approaches. The depth of the interviewer's ML knowledge is also questionable as the interviewer did not understand how pretrained networks can be used as feature extractors. The interviewer also asked about variational auto-encoder without knowing the underlying probabilistic formulation. Overall, a negative experience.

Example Questions: Q: How would you visualize and present a particularly complex data set? Q: How would deal with a high dimensional data set? Q: What ML techniques are you familiar with and what are the tradeoffs between them?
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Machine Learning Engineer

Interviewed at Whip Media

3.5
Aug 8, 2020

Example Questions: Q: How would you visualize and present a particularly complex data set? Q: How would deal with a high dimensional data set? Q: What ML techniques are you familiar with and what are the tradeoffs between them?

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