Davide Buffelli

Ph.D. · AI Researcher · davide.buffelli [at] mtkresearch.com

I am a Senior Deep Learning Researcher at MediaTek Research in London (UK). I have a broad interest in Deep Learning, with a current focus on foundation models for multimodal time-series, optimization, and representation learning for structured data.

I hold a Ph.D. in Information Engineering from the University of Padova, where I focused on Graph Neural Networks and Graph Representation Learning and I was supervised by Professor Fabio Vandin. During my PhD I have been a Research Scientist Intern at Meta AI (London) and at Samsung AI Research (Cambridge), and a visiting student in Professor Pietro Liò's group at the University of Cambridge, and in Dr. Bastian Rieck's group at Helmholtz Munich. You check out my full CV here.

News

01/2026 Our paper "A Finite Time Analysis of Thompson Sampling for Bayesian Optimization with Preferential Feedback" has been accepted at AISTATS 2026! This was a collaboration with Sattar Vakili, Joseph Lazzaro,and Da-shan Shiu.
09/2025 Our paper "LGDC: Latent Graph Diffusion via Spectrum-Preserving Coarsening" has been accepted at the New Perspectives in Advancing Graph Machine Learning Workshop at NeurIPS 2025! This was a great collaboration with Nagham Osman, Keyue Jiang, Xiaowen Dong, and Laura Toni.
05/2025 Our tutorial on Foundation Models for Communication Systems has been accepted at Globecom 2025!
12/2024 I will be giving an invited talk at the NeurIPS@Cambridge meetup (at the University of Cambridge on the 06/12/2024)
11/2024 Our paper "CliquePH: Higher-Order Information for Graph Neural Networks through Persistent Homology on Clique Graphs" has been accepted at LoG 2024! Great collaboration with Farzin Soleymani and Bastian Rieck.
09/2024 Two papers accepted at NeurIPS 2024! "Exact, Tractable Gauss-Newton Optimization in Deep Reversible Architectures Reveal Poor Generalization" with colleagues from MediaTek Research, and "Deep Equilibrium Algorithmic Reasoning" in collaboration with Dobrik Georgiev, JJ Wilson, and Pietro Liò .

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Publications


  • A Finite Time Analysis of Thompson Sampling for Bayesian Optimization with Preferential Feedback
    Sattar Vakili, Joseph Lazzaro, Davide Buffelli, Da-shan Shiu, Twenty-Ninth Annual Conference on Artificial Intelligence and Statistics (AISTATS), 2026.
    [Paper coming soon]
  • LGDC: Latent Graph Diffusion via Spectrum-Preserving Coarsening
    Nagham Osman, Keyue Jiang, Davide Buffelli, Xiaowen Dong, Laura Toni, NeurIPS 2025 Workshop on New Perspectives in Advancing Graph Machine Learning, 2025.
    [Paper]
  • Group Think: Multiple Concurrent Reasoning Agents Collaborating at Token Level Granularity
    Chan-Jan Hsu, Davide Buffelli, Jamie McGowan, Feng-Ting Liao, Yi-Chang Chen, Sattar Vakili, Da-shan Shiu, arXiv, 2025.
    [PDF (arXiv)]
  • Towards a Foundation Model for Communication Systems
    Davide Buffelli*, Sowmen Das*, Yu-Wei Lin*, Sattar Vakili*, Chien-Yi Wang, Masoud Attarifar, Pritthijit Nath, Da-shan Shiu, ML4Wireless Workshop @ ICML, 2025.
    [PDF (arXiv)]
  • Exact, Tractable Gauss-Newton Optimization in Deep Reversible Architectures Reveal Poor Generalization
    Davide Buffelli*, Jamie McGowan*, Wangkun Xu, Alexandru Cioba, Da-shan Shiu, Guillaume Hennequin, Alberto Bernacchia, Thirty-Eighth Annual Conference on Neural Information Processing Systems (NeurIPS), 2024.
    [Paper] [PDF (arXiv)] [Code]
  • Deep Equilibrium Algorithmic Reasoning
    Dobrik Georgiev, JJ Wilson, Davide Buffelli, Pietro Liò, Thirty-Eighth Annual Conference on Neural Information Processing Systems (NeurIPS), 2024.
    [Paper] [PDF (arXiv)] [Code]
  • CliquePH: Higher-Order Information for Graph Neural Networks through Persistent Homology on Clique Graphs
    Davide Buffelli*, Farzin Soleymani*, Bastian Rieck, Proceedings of the Third Learning on Graphs Conference (LoG), 2024.
    [Paper] [PDF (arXiv)] [Code]
  • The Deep Equilibrium Algorithmic Reasoner
    Dobrik Georgiev, Pietro Liò, Davide Buffelli, CVPR Workshop on Multimodal Algorithmic Reasoning, 2024. (Spotlight)
    [Paper] [PDF (arXiv)]
  • Is Meta-Learning the Right Approach for the Cold-Start Problem in Recommender Systems?
    Davide Buffelli, Ashish Gupta, Agnieszka Strzalka, Vassilis Plachouras, Preprint, 2023.
    [PDF (arXiv)]
  • Improving the Effectiveness of Graph Neural Networks in Practical Scenarios
    Davide Buffelli, PhD Thesis, University of Padova, 2023.
    [Full Text]
  • Scalable Theory-Driven Regularization of Scene Graph Generation Models
    Davide Buffelli*, Efthymia Tsamoura*, Thirty-Seventh AAAI Conference on Artificial Intelligence (AAAI), 2023.
    [Paper] [PDF (arXiv)]
  • SizeShiftReg: a Regularization Method for Improving Size-Generalization in Graph Neural Networks
    Davide Buffelli, Pietro Liò, Fabio Vandin, Thirty-sixth Conference on Neural Information Processing Systems (NeurIPS), 2022.
    [Paper] [PDF (arXiv)] [Code]
  • Graph Representation Learning for Multi-Task Settings: a Meta-Learning Approach
    Davide Buffelli, Fabio Vandin, International Joint Conference on Neural Networks (IJCNN), 2022. (Oral)
    [Paper] [PDF (arXiv)] [Code]
  • The Impact of Global Structural Information in Graph Neural Networks Applications
    Davide Buffelli, Fabio Vandin, Data (special issue "Knowledge Extraction from Data Using Machine Learning"), 2022.
    [Paper] [PDF (arXiv)] [Code]
  • Extending Logic Explained Networks to Text Classification
    Rishabh Jain, Gabriele Ciravegna, Pietro Barbiero, Francesco Giannini, Davide Buffelli, Pietro Liò, The 2022 Conference on Empirical Methods in Natural Language Processing (EMNLP), 2022.
    [Paper] [PDF (arXiv)]
  • Attention-Based Deep Learning Framework for Human Activity Recognition with User Adaptation
    Davide Buffelli, Fabio Vandin, IEEE Sensors Journal, 2021.
    [Paper] [PDF (arXiv)] [Code]
  • A Meta-Learning Approach for Graph Representation Learning in Multi-Task Settings
    Davide Buffelli, Fabio Vandin, NeurIPS Workshop on Meta-Learning (MetaLearn), 2020.
    [PDF] [PDF (arXiv; with Appendix)] [Video] [Slides] [Poster] [Code]

You can send me an email at davide.buffelli [at] mtkresearch.com, and you can find me on Google Scholar, ORCID, LinkedIn, GitHub, and Twitter.