# Yijie Bei

> Fireworks.ai, Training Platform Lead | ex-Meta

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

Interested in everything, happen to learn fast

## Work Experience
### Software Engineer, Manager @ Fireworks AI
Jan 2023 – Present | Redwood City, California, United States
GenAI
multi-modal language models, fine tuning, speculative decoding, reinforcement learning

### Senior Machine Learning Engineer @ Facebook
Jan 2022 – Jan 2023 | Menlo Park, California, United States
MRS(modern recommendation systems) - Feed Core ML, ML foundations team

Founding member of Minimal Viable AI. Tech lead for upgrading Feed ranking models to Minimal Viable AI stack. Rewrote trainer, feature proprocessing library, post-training optimization / publishing pipeline, design and implemented debugging / model understanding tools.

### Machine Learning Engineer @ Facebook
Jan 2020 – Jan 2022 | Menlo Park, California, United States
2021 - : News Feed ML & Recommendation (MRS)

Founding member of Minimal Viable AI, rebuilding recommendation platform for Feed, Instagram, Reels etc from scratch.

2020 - 2021: AI Platform Infra (Deep Personalization Team, aka DPER)

Next generation recommendation platform for Facebook Ads, Feed, Instagram etc

### Duke Prediction Analysis Lab @ Duke University
Jan 2018 – Jan 2020 | Raleigh-Durham, North Carolina Area
Supervised by Professor Cynthia Rudin:
1. Single-image super-resolution, published paper at CVPR workshop 2018
2. Interpretable CNN models through concept disentanglement. Paper published on Nature Machine Intelligence

### Duke Bergelson Laboratory - Programming Research Assistant @ Duke University
Jan 2018 – Jan 2019 | Raleigh-Durham, North Carolina Area
Developed an OCR software for birth records processing
Contribute to PyCLAN library that parses CLAN files

### Teaching Assistant @ Duke University
Jan 2017 – Jan 2019 | Raleigh-Durham, North Carolina Area
Teaching Assistant
CS 671 Graduate Class In Machine Learning
Computer Architecture
Multivariable Calculus
Linear Algebra

### Undergraduate Researcher, Software Engineer @ Duke University
Jan 2017 – Jan 2017 | Raleigh-Durham, North Carolina Area
Research on the formation of galaxies and the spiral patterns from gas cloud collapse  as a consequence of the Wave Dark Matter theory by Professor Hubert Bray
Simulation, efficient differential equation solver

### Research Assistant @ Duke University
Jan 2016 – Jan 2017 | Raleigh-Durham, North Carolina Area
Research on the acceleration of distribution sampling

### Software Engineer Intern @ Facebook AI
Jan 2019 – Jan 2019 | Menlo Park
Applied Machine Learning Personalization Team
Large scale graph learning for Facebook Ads and Feed

### Algorithms Engineer Intern @ JD.COM
Jan 2018 – Jan 2018 | Haidian District, Beijing, China
Front page ads CTR modeling

### Software Engineer Intern @ Uptake
Jan 2018 – Jan 2018 | Chicago, Illinois
Insight Engines team
Anomaly detection model training and scoring

### Software Engineer Project Lead @ Stoooges Education
Jan 2016 – Jan 2017 | Hangzhou, Zhejiang, China
Full stack developer, Stoooges Maze system that facilitates students' university application process

### Research Assistant @ Nanyang Technological University
Jan 2014 – Jan 2015 | Singapore
Organic-inorganic hetero-junction solar cell efficiency measurement and improvement
Won Nanyang Research Gold Award


## Education
### Triple Major in B.S.E. Electrical and Computer Engineering, B.S. Computer Science, B.A. Mathematics
Duke University

### Cambridge-Singapore GCE-Alevel Certificate in A-Level
Victoria Junior College

### Anglo-Chinese School (Independent)


## Contact & Social
- LinkedIn: https://linkedin.com/in/yijie-bei-2878b1126

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Source: https://flows.cv/yijie
JSON Resume: https://flows.cv/yijie/resume.json
Last updated: 2026-03-23