Python
Daily returns for stocks
Determine the percent of daily return from one closing price to the next closing price.
Search query and candidate product title similarity
Compute the Jaccard similarity between the user's search query and the candidate product title.
Candidate product was viewed by user
Determine if the candidate product is included in the user's most recent 10 product visits within the last hour.
Applicant’s total spend across accounts
Determine an applicant’s total spend across accounts in the last 30, 60, and 90 days.
Z-score of current transaction amount
Identify by how many standard deviations the current transaction amount deviates from the mean transaction amount for a user.