DatabasesBackendTable-stakesAround since 2009
Redis
An extremely fast, in-memory data store commonly used for caching, session storage, and rate limiting.
Think of it like
Like a sticky note pinned right on your monitor for the handful of things you need instantly, instead of walking to the filing room every time.
Junior or senior?
Junior sounds like
Has only used Redis for basic key-value caching.
Senior sounds like
Has used it for rate limiting, pub/sub, or leaderboards, and understands the tradeoff of it being in-memory.
Ask them
“Beyond caching, what else have you used Redis for?”