Recommendations
SnooRec: A Shared Retrieval Foundation for Reddit Recommendations
Our short summary of Reddit’s engineering write-up. The full story, with all the detail, is on their blog.
Read the full write-up on reddit.com (opens in a new tab)Problem
Different product surfaces needed personalized recommendations but each optimized for different user actions.
Solution
Reddit built SnooRec, a shared retrieval system that uses task‑specific user vectors, a common item index, and a control layer to mix intents and query a single ANN index.
Want the architecture, code and numbers? They’re in the original post.
Read the full write-up on reddit.com (opens in a new tab)