Paypal Data Scientist Analytics & Experimentation Interview Questions
Practice the exact questions companies are asking right now.
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How would you measure impact?
A payments company launches a new fraud-screening feature that adds an extra risk check before approving certain transactions. Leadership wants to kno...
How to evaluate a new homepage feature
Scenario PayPal plans to launch a new homepage feature (e.g., a new CTA module, personalized content, or a redesigned layout). You are asked to evalua...
Design a fraud mitigation strategy under constraints
You are given a one-page case during a hiring manager round for a Fraud Data Scientist role. Current state: - The existing fraud model is performing p...
Evaluate smart cart idea with hypotheses and experiment
Instacart partners with a local grocery store to introduce a “smart cart” in the physical store. The smart cart UI lets shoppers: 1) search/browse ite...
Design and evaluate a fraud detection strategy
Context You are interviewing for a Fraud Data Scientist role at a payments company. The company has a fraud model and some operational constraints. Pa...
Diagnose drop in shopper accepted orders
Instacart notices a sudden issue: on Sunday afternoon, the number of orders accepted by shoppers drops by about 2/3 compared to the usual baseline. As...
Design causal study for airport cancellation reduction
You are a Senior Data Scientist supporting an airport pickups team at a rideshare company. Context: - Airport pickups are operationally different from...
Design metrics and an experiment for Eats donations
Uber Eats is considering a new feature: when a user places an order, they can optionally add a donation to the merchant (or a merchant-selected cause)...
Present an A/B test project review
Onsite Project Review: Analyze and present an A/B test Before the onsite, you completed a take-home project analyzing an A/B test (you can assume typi...
Reduce airport cancellations under causal constraints
You are a Data Scientist on an airport rides team for a ride-hailing marketplace. Airport rides differ from city rides: - Drivers often enter an airpo...
Evaluate a New Homepage Feature
PayPal is considering launching a new homepage feature. Design an experiment to evaluate whether the feature should be shipped. Your answer should cov...
Define Success with Contact Syncing for Growth and Evaluation
Using "% of users with contacts synced" as a growth driver Context You are a data scientist at a consumer fintech app with strong network effects in p...
Analyze Transactions for Risk and Implement Mitigation Strategies
Real-Time Payments Risk: Accept or Decline, With Immediate Mitigations Scenario Two new card transactions arrive, and you must decide in real time whe...
Explain P-Value and Errors in A/B Testing
A/B Test Design and Analysis: Core Concepts Scenario You are advising on the design and analysis of an A/B test for a new product feature (e.g., a che...
Analyze an A/B test and present recommendation
You are given an offline take-home style project before an onsite interview. You must analyze an A/B test and present your findings in slides. Assume ...
Diagnose drop in shopper order acceptance
Marketplace Diagnosis Case: Shopper acceptance drops on Sunday afternoon You observe that on Sunday afternoon, the number of orders that shoppers acce...
Design metrics and experiment for donation feature
Product/Experimentation Case Uber Eats is considering a new feature: when a user places an order, they can optionally donate (tip-like or charitable d...
Boost User Login Rate: Key Metrics to Monitor
Scenario You are the product data scientist responsible for improving a consumer fintech platform's user authentication experience and increasing the ...
Design an A/B for ATO rule
Experiment Design Case: Real-time ATO Rule for PayPal/Venmo Context: You are designing and analyzing an online experiment to estimate the net business...
Master A/B Testing: Key Concepts and Methodologies Explained
A/B Testing and Causal Inference: Core Concepts and Practice Scenario You are a data scientist interviewing for a role working on an online product. Y...