Bay Area · California

Rui Huang

Senior Staff Machine Learning Engineer. I build search, retrieval, and ranking systems — from query understanding to multi-stage ranking to LLM-powered discovery.

GitHub LinkedIn

Experience

Coupang2023 — Present
Senior Staff MLE, Search Ranking — Tech Lead, Search & Discovery

Leading search and discovery: query rewriting, retrieval, multi-stage ranking, and LLM-powered product discovery.

Meta2022 — 2023
Staff MLE, Feed Recommendation
Pinterest2018 — 2022
Senior MLE / Tech Lead, Search & Discover
AWS2016 — 2018
Senior Machine Learning Engineer
MetLife2014 — 2015
Machine Learning Engineer

Education

New York University — Master's
Shanghai Jiao Tong University — Bachelor's

Projects

ML Interview Prep →
A comprehensive interview-prep site for ML system design, retrieval, and ranking — 160-question bank, flashcards, and mock-interview mode.
Career Tracker →
My job-search dashboard — companies, contacts, and interview pipeline.
Trip Picks →
A weekly-updated weekend trip picker for Bay Area families — ranked destinations with prices, events, and mini-plans.

Writing

The 5th Layer: A Hidden Training–Serving Skew in Generative Retrieval
On a subtle skew between training and serving in generative retrieval systems. (Forthcoming)