Top 48
Prep plan
Updated weekly · Last refresh Aug 30

SoFi Data Scientist Interview Questions

The questions to prepare for a SoFi Data Scientist interview. Questions from real interview reports rank first. Updated weekly.

48questions
~7htotal time
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1
Statistics & ProbabilityStart here. 4 questions · ~33 min
2
Metrics6 questions · ~50 min
Calculate LTV for New SoFi Invest MembersMedium

Calculate the lifetime value (LTV) of a new SoFi Invest member and decompose factors influencing it.

CACLTVEngagement MetricsSoFi
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3
Model Evaluation6 questions · ~50 min
Choose RMSE vs MAEEasy

Compare two rent prediction models and decide whether MAE or RMSE is the better selection metric given costly large errors.

RegressionMAERMSESoFi
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4
Product Sense4 questions · ~33 min
Approach New Feature DesignMedium

A structured approach for designing a new feature in an existing product, from user need to MVP and success criteria.

Feature PrioritizationUser NeedsUse CasesSoFi
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5
Machine Learning14 questions · ~117 min
Detect Card Fraud with Imbalanced DataEasy

Build an imbalanced binary classifier for card fraud detection using class weighting, resampling, and threshold tuning with PR-focused evaluation.

Hyperparameter TuningCross-ValidationFeature EngineeringSoFi
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6
Pipelines6 questions · ~50 min
Data Collection and Validation ExperienceEasy

Explain how you have collected data from source systems and validated it before loading it into analytics tables.

ToolsData ModelingQualitySoFi
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7
More topics8 questions · ~67 min
Test Pricing Change Revenue LiftHard

Design an A/B test to determine whether a pricing change on the a16z subscription product improves durable revenue versus temporarily shifting buyer behavior.

ExperimentationGuardrail MetricsA/B TestingSoFi
Optimizing Large Transaction Table JoinsHard

Explain how to tune a slow PostgreSQL query that joins several large transaction tables using indexes, join strategy, and partitioning.

JoinsperformancesqlSoFi
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 48 questions plus 3 hands-on drills to finish this plan.