Gustavo Penha

I am a research scientist at Spotify working with search and recommendation. I will soon defend my PhD at TU Delft, under the supervision of Claudia Hauff. Other than science I am passionate about photography and I am working on my first photobook ๐ผ๏ธ.
news
Jan 2, 2023 | Started new job as a research scientist at Spotify ๐ต. |
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Apr 19, 2022 | We won the best paper award with our ECIRโ22 paper ๐ ๐. |
Aug 27, 2021 | Finished my research internship at Amazon ๐ฆ: CHIโ22 & CHIIRโ22. |
research interests
Representation learning for rankingText encoders learn representations for queries and documents, which are then used to calculate a relevance score. The goal is that relevant documents get close to the query and non-relevant documents get far from the query in the embedding space. I am interested in many aspects of representation learning, including negative sampling, disentanglement and interpretability. |
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Explainability and model understandingInformation filtering systems, such as document rankers and recommender systems, have a large impact into what we are able to find, what we are exposed to and the decisions we make. Understanding the behavior of such models, when they fail, how robust they are, and why they are recommending certain items over others is crucial for both machine learning practitioners and end users. |
selected publications
- CIKM
presentations
Slides for our ECIR 2022 paper on query variations. video ๐ฌ.Slides for the Glasgow IR seminar on 10 May 2021: video ๐ฌ.