Yiming Xu

Yiming Xu

PhD Fellow working on Multimodal Document Understanding at the Computer Vision Center, Universitat Autònoma de Barcelona.

I work in the Vision & Language Group at CVC, UAB, advised by Dimosthenis Karatzas and Ernest Valveny — building agentic document-understanding systems and foundation models for document understanding.

Before Barcelona I earned an MSc at the University of Amsterdam (thesis on Multimodal RAG) and spent two years as principal developer building e-commerce AI agents.

yiming@cvc.uab.cat Download CV (PDF) ↓
Yiming Xu

Selected project

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2025

Hierarchical Planner

A navigation-first planner that walks a document's hierarchy instead of flat top-k retrieval, using layered embeddings as routing hints.

2022 — 2024

E-commerce AI Agent

Flagship conversational shopping agent. Led development end-to-end; the project went on to raise close to USD 7M in funding.

2023

Multimodal RAG

Master's thesis on retrieval-augmented generation across text and image, supervised by Benno Kruit and Jan-Christoph Kalo.

Recent writing

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Recent publications

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Awards