Sharing my onsite interview experience. Hope it helps someone :)

Screen - first week of the month - 2 rounds of 1 hour each
ML integration - 1 hour - using a real data set to solve a problem
Coding round - 1 hour

Screen ML integration round -

• Asked to build a model in a Jupyter notebook environment, given a data set.
• Had to build the target variable from the data. Had to drop columns that were unrelated.
• Built a model that was better than random in performance. Used balanced class accuracy for class labels as there was some skew. Asked a follow up for probs, said AUC curve explained a bit.
• Was allowed to check syntax for various things e.g., probabilities from logistic regression classifier
• Emphasis on building something end-to-end not perfect

Screen Coding round -

• Not leetcode style
• multi part question leetcode easy
• mostly straightforward

Onsite last week of the month

• 1 coding round
• 1 bug squash round
• ML design round
• Manager chat - behavioral round

Coding round

• Multi-part Leetcode easy question (I was asked and successfully solved 2 parts)
• emphasis on test cases

Bug Squash

• I was given a Hackerrank link with a trained model and a code package that loaded the model + ran some tests
• had 2 bugs, I identified both
• Fixed the first one
• Stumbled at the last step while fixing the second
• Was allowed to look through API docs from the web

ML design round -

• Non standard design question, specific to Stripe
• The interviewer kept interrupting me to ask clarifications, so I could not make it to the end of the design.
• Model design and beyond, I had to just provide a brief overview at the end of my 1 hour.

Manager chat

• Was okay. Asked the standard Sr-level questions on ambiguity handling, mentoring junior folks, continuous learning on a project etc
• One specific thing they wanted to know -
  • Focused on quantifying impact, which I sort of did, but I did not have concrete revenue increase numbers for my project.

Hope this helps folks prepare for their interviews. Good luck, everyone!