# Where Do Recommenders Run? An Architecture Tour: Netflix, YouTube, Spotify, Amazon, TikTok, Trendyol

> Source: https://sukruyusufkaya.com/en/learn/oneri-sistemleri/tavsiye-motorlari-nerede-calisir-mimari-turu
> Updated: 2026-05-13T13:29:33.443Z
> Category: Öneri Sistemleri
> Module: Module 1: Landscape of Recommender Systems & Problem Formulation
**TLDR:** A concrete architecture tour of 6 major companies based on published engineering blogs: Netflix retrieval-ranking, YouTube two-stage, Spotify BaRT, Amazon item-CF heritage, TikTok Monolith, Trendyol personalization.