Top 30
Prep plan
Updated weekly · Last refresh Aug 30

Klaviyo Machine Learning Engineer Interview Questions

The questions to prepare for a Klaviyo Machine Learning Engineer interview. Questions from real interview reports rank first. Updated weekly.

30questions
~5htotal time
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1
CodingStart here. 7 questions · ~64 min
Simulate Dice Sum ProbabilityEasy
Practice

Problem Write a Python function that simulates rolling two fair six-sided dice for a given number of trials and returns the empirical probability that the...

probabilitysimulationpythonKlaviyo
O(1) Insert Delete Random SetEasy
Practice

Implement a set-like structure using an array and hash map to support insert, delete, and random access in average O(1) time.

Hash TablesArraysData StructuresKlaviyo
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2
System Design3 questions · ~28 min
Design a Real-Time ML Feature StoreHard

Design a shared feature store for training and low-latency inference across many ML systems with strict freshness and consistency needs.

Feature StoreFeature DriftModel ServingKlaviyo
Design Feature Drift Monitoring SystemHard

Design a production ranking system with robust feature drift monitoring across batch and real-time features at high QPS.

Feature StoreFeature DriftModel ServingKlaviyo
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3
Pipelines3 questions · ~28 min
Optimize Memory Heavy Pandas PipelineMedium

Explain how to reduce memory usage and stabilize a Pandas-based batch pipeline that is failing on larger inputs.

InfrastructureData WranglingQualityKlaviyo
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4
Statistics & Probability5 questions · ~46 min
A/B Test for Predictive SendingMedium

Tests experimental design and statistical validation for predictive marketing features at Klaviyo.

experiment designA/B TestingKlaviyo
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5
Behavioral & Leadership10 questions · ~92 min
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6
More topics2 questions · ~18 min
Model Evaluation and Data AggregationMedium

Evaluates your approach to aggregating data and selecting appropriate model evaluation methods.

Model EvaluationKlaviyo
Klaviyo Churn Prediction with LifetimesHard

Evaluates your ability to build and evaluate a churn model using the lifetimes approach at Klaviyo.

Klaviyo
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