I have recently started as a post-doc with Kyunghyun Cho and Krzysztof Geras at New York University. I am also an advisor at Molecule.one . I do my best to contribute to the broad machine learning community. Currently, I am on the Scientific Committee of EEML, and serve as an area chair for NeurIPS. I received my PhD from Jagiellonian University co-supervised by Jacek Tabor and Amos Storkey (University of Edinburgh). During PhD, I spent two summers as a visiting researcher with Yoshua Bengio, and collaborated with Google Research in Zurich.

My email is staszek.jastrzebski (on gmail).


  • (12.2019) Our work on the early phase of the optimization trajectory has been accepted to ICLR 2020 as Spotlight! ArXiv will follow soon.
  • (09.2019) Large Scale Structure of Neural Networks' Loss Landscape has been accepted to NeurIPS 2019!
  • (06.2019) Received top 5% reviewer award for ICML 2019 :)
  • (03.2019) Our paper on parameter efficient training of BERT was accepted to ICML 2019!
  • (01.2019) Papers accepted to ICLR 2019, and AISTATS 2019! Also, our preprint on Neural Architecture Search is online.

My main research goal is to understand and improve how deep network generalize. My research interests include:

  • Optimization in Deep Learning
  • Representation Learning
  • Natural Language Processing
  • Computer Aided Drug Design


  • [MSc] Olivier Astrand (NYU) - Regularization effects of instability in training
  • [MSc] Sławomir Mucha (UJ) - Pretraining in deep learning in cheminformatics
  • [MSc] Tobiasz Ciepliński (UJ) - Evaluating generative models in chemistry using docking simulators
  • [BSc] Michał Zmysłowski (UW) - Gradient structure and generalization
  • You? I am always looking for new promising students
  • [Defended, MSc] Tomasz Wesołowski - Relevance of enriching word embeddings in modern deep natural language processing
  • [Defended, MSc] Andrii Krutsylo - Physics aware representation for drug discovery
  • [Defended, BSc] Michał Soboszek - Evaluating word embeddings
  • [Defended, MSc] Jakub Chłędowski - Representation learning for textual entailment
  • [Defended, MSc] Mikołaj Sacha - Meta learning and sharpness of the minima

Selected publications

For a full list please see my Google Scholar profile.

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On the Relation Between the Sharpest Directions of DNN Loss and the SGD Step Length

S. Jastrzębski, Z. Kenton, N. Ballas, A. Fischer, Y. Bengio, A. Storkey

International Conference on Learning Representations 2019
code .pdf poster

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Three factors influencing minima in SGD

S. Jastrzębski*, Z. Kenton*, D. Arpit, N. Ballas, A. Fischer, Y. Bengio, A. Storkey

International Conference on Artificial Neural Networks 2018 (oral), International Conference on Learning Representations 2018 (workshop)

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Residual Connections Encourage Iterative Inference

S. Jastrzębski*, D. Arpit*, N. Ballas, V. Verma, T. Che, Y. Bengio

International Conference on Learning Representations 2018
.pdf poster

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A Closer Look at Memorization in Deep Networks

D. Arpit*, S. Jastrzębski*, N. Ballas*, D. Krueger*, T. Maharaj, E. Bengio, A. Fischer, A. Courville, S. Lacoste-Julien, Y. Bengio

International Conference on Machine Learning 2017
.pdf poster slides

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Quo vadis G Protein-Coupled Receptor ligands? A tool for analysis of the emergence of new groups of compounds over time

D. Lesniak, S. Jastrzębski, W. M. Czarnecki, S. Podlewska, A. Bojarski

Bioorganic & Medicinal Chemistry Letters, 2017

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Learning to SMILE(S)

S. Jastrzębski, D. Lesniak, W. M. Czarnecki

International Conference on Learning Representations 2016 (workshop track)
.pdf poster

Short CV

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Google AI

Research intern, automatic machine learning

11.2018-, Zurich, Switzerland

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Research intern supervised by prof. Yoshua Bengio

Summer 2016 & 2017, Montreal, Canda

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Machine Learning intern, fraud detection models and Deep NLP applications

7-9.2016, London, UK

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University of Edinburgh

Research intern, Deep Learning for Go, under the supervision of prof. Amos Storkey

9-11.2015, Edinburgh, UK

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SDE intern, distributed data systems

2015, Palo Alto, USA

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SDE intern, API research and design

2014, Redmond, USA

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SDE intern, data processing framework development

2013, London, UK


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Word Embeddings Benchmarks

Python package for evaluating word embeddings.


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ML algorithms C++ implementations for R, including online clustering, swappable SVM library interface and new clustering algorithm.

github url

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KrakRobot Simulator

Simulator for 2015 and 2016 editions online qualification round.

github url


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Optimization in Deep Learning

Lecture @ GMUM Deep Learning Workshop

2018, Cracow, Poland

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Understanding How Deep Networks Learn

Invited talk @ PL in ML

2017, Warsaw, Poland
slides video