It took much longer than I expected to go through the interview process at Instacart, spanning about five weeks. After an initial technical screen, I faced various rounds that included system design and behavioral interviews. One standout was designing an item recommendation system—funny enough, this problem was a variant of a question I had worked on at prachub.com just a few days prior. In the end, I received an offer, but I decided to decline it. Overall, it was challenging but a valuable experience.

How would you design Instacart's item recommendation system for grocery baskets?

Explain how you would handle severe class imbalance in a fraud detection model.

Design an ETA prediction model for grocery delivery, including features and evaluation metrics.