# Hongjie Bai

> Software Engineer

Location: San Francisco Bay Area, United States
Profile: https://flows.cv/hongjiebai

Machine Learning

## Work Experience
### Principal Software Engineer @ Meta
Jan 2018 – Present
TL of Facebook Reels Short Video Recommendation. Retrieval/Ranking/Quality/Distribution/Creator.

### Tech Lead Manager @ Pinterest
Jan 2017 – Jan 2018 | San Francisco, California
Lead/Manage Ads Targeting and Retrieval team:
Build Ads Targeting Features: Interest Targeting, Keyword Targeting, Audience Targeting, Auto Targeting.
Build ML models and ranking algorithms to retrieve ads to optimize relevance/quality.

### Staff Software Engineer(TLM) @ Google
Jan 2011 – Jan 2017 | Mountain View
Remarketing Ads:

Founding engineer of dynamic remarketing ads quality. I initiated and built most of the core dynamic ads quality components including: product selection strategy; product selection models; pCTR/pCVR related models.

### Software Engineer @ Google
Jan 2007 – Jan 2011 | BEIJING
Large Scale Machine Learning:

Parallelize popular machine learning algorithms on thousands of machines.

Use machine learning technology on tens of Google products. Hands-on experience on label suggestion, recommendation engine, text generalization etc.


## Education
### Master in Computer Science
Tsinghua University

### Bachelor in Computer Science
Peking University


## Contact & Social
- LinkedIn: https://linkedin.com/in/hongjie-bai-5abaa512

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Source: https://flows.cv/hongjiebai
JSON Resume: https://flows.cv/hongjiebai/resume.json
Last updated: 2026-04-12