RedditSystem Design·60 minMembers
Post / Comment Ranking System
Members only
Design a ranking system for posts (subreddit / home feed) or comments (within a post). Covers candidate generation, feature retrieval, online inference, A/B testing, and the cold-start path. The inter...
MLE
mlsd
ranking
recommendation
feed
feature-engineering
inference
medium
Frequency
Low
Last asked
2026-03-23
Stage
onsite-system-design
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