RobloxSystem Design·60 minMembers
Like / Unlike Counter System
Members only
Design a like / unlike service that supports per-user, per-item like state, list of items a user has liked, and an approximate or exact total like count per item — at platform scale (hundreds of milli...
SWE
Infra Eng
system-design
ranking
caching
scaling
sharding
schema-design
idempotency
hard
Frequency
Medium
Last asked
2026-07-23
Stage
phone-screen · oa · onsite-system-design
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