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Case Study, SQL, and a Live Python EDA Round

CoinbaseData Scientist · Onsite · Oct 2025

Part 1: case study plus SQL and Python. The case: an e-commerce company wants to send personalized emails to boost conversion rate. How do you measure success? It was basically the standard A/B test process — define the metrics, figure out how to calculate the sample size, all of that. There was a follow-up at the end: suppose we ran the experiment and saw conversion rate go up 20%, we thought it…

Shared by a candidate · reported Oct 2025. Interview formats change; use it as a guide, not a script.