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Weien Li
Portrait of Weien (Barry) Li

Machine Learning Scientist · Wayfair · McGill

Weien (Barry) Li

I work on multimodal retrieval, agent evaluation, and a secret area :).

I received my B.Sc. in Computer Science from McGill University in 2023, and a Master of Business Analytics from MIT in 2025.

During my studies I held several research assistantships at both MIT and McGill. I was a Forward Deployed Engineer and a Data Scientist at Invisible Technologies. I am now a Machine Learning Scientist at Wayfair.

Recent papers include MINER on multimodal retrieval, QUACK (EMNLP 2026 Main) on grounding in social-deduction agents, CARE (EMNLP 2026 Findings) on privacy-compliant clinical reasoning, and a survey of discrete diffusion models.

Resume

News

  1. I joined Wayfair as a Machine Learning Scientist.

  2. Two paper I co-authored are accepted to EMNLP 2026, “QUACK: Questioning, Understanding, and Auditing Communicated Knowledge in Multimodal Social Deduction Agents” and “CARE: Privacy-Compliant Agentic Reasoning with Evidence Discordance”.

  3. Our survey The paper I co-authored, Discrete Diffusion Models: A Unified Framework from Tokenization to Generation is on arXiv.

  4. “The paper I first authored, MINER: Mining Multimodal Internal Representation for Efficient Retrieval” is on arXiv.

  5. I joined Invisible Technologies as a Data Scientist/Forward Deployed Engineer.

  6. I received a Master of Business Analytics from MIT.

  7. I started working as a research assistant at MIT with Prof. Vivek Farias and Meta.

  8. I graduated from McGill University with a B.Sc. in Computer Science with distinction.