DatabasesBackendAround since 2010
Elasticsearch
Also written as OpenSearch
A search-and-analytics engine optimized for fast full-text search and filtering across large amounts of data, commonly used to power a site's search bar or log analysis.
Think of it like
Like a librarian who's pre-indexed every word in every book, versus one who'd have to flip through each book individually to find a phrase.
Junior or senior?
Junior sounds like
Stood up a default Elasticsearch cluster and left the relevance ranking alone.
Senior sounds like
Has tuned relevance/ranking themselves and can describe what made a result rank higher or lower.
Ask them
“Have you tuned Elasticsearch's relevance ranking yourself? What made a search result rank higher or lower?”