- ML Engineer, Hugging Face1
Hynek Kydlíček is a machine learning engineer at Hugging Face. Kydlíček is the second author of the FineWeb datasets paper (2024) and the FineWeb2 paper (2025), both first-authored by Guilherme Penedo, and a co-author of the FineTranslations dataset and of the SmolLM2 paper (2025).12345
At a glance
- Current role
- ML Engineer
- Company
- Hugging Face
- Sector
- Company
- Fields
- Datasets and data, Language models
- Work listed
- 2
- Sources cited
- 8
- Profile reviewed
Research
Kydlíček's early work includes a 2023 dataset and baselines for classifying Czech news texts and contributions to the BenCzechMark benchmark (2024). At Hugging Face Kydlíček co-authored the FineWeb (2024) and FineWeb2 (2025) dataset papers as second author.67231
Kydlíček is also a co-author of the SmolLM2 paper (2025), of the FineTranslations dataset (2026) and of a 2026 study on synthesizing pretraining data.548
Work and contributions
Timeline
- Posted a dataset and baselines for classifying Czech news texts as first author.6
- Co-authored the FineWeb datasets paper as second author.2
- Co-authored the SmolLM2 paper.5
- Co-authored the FineWeb2 paper as second author.3
- Co-authored a systematic study of prompt design for synthesizing pretraining data.8
Where they work
- Hugging Face 34 people in the wiki
Related people
- Guilherme PenedoAlso at Hugging Face
- Loubna Ben AllalAlso at Hugging Face
- Anton LozhkovAlso at Hugging Face
- Yacine JerniteAlso at Hugging Face
- Victor SanhAlso at Hugging Face
- Zach NussbaumLanguage models · Datasets and data
- Pradeep DasigiLanguage models · Datasets and data
- Sheshansh AgrawalLanguage models · Datasets and data
- Adina WilliamsLanguage models · Datasets and data
- Rangan MajumderLanguage models · Datasets and data
Suggest a correction or removal
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References
8 sources · profile reviewed Oct 22, 2026 · data updated Oct 22, 2026
- hynky1999 (Hynek Kydlíček) on GitHub
- The FineWeb Datasets: Decanting the Web for the Finest Text Data at Scale (arXiv 2406.17557)
- FineWeb2: One Pipeline to Scale Them All (arXiv 2506.20920)
- Guilherme Penedo — homepage (FineTranslations entry)
- SmolLM2: When Smol Goes Big — Data-Centric Training of a Small Language Model (arXiv 2502.02737)
- A Dataset and Strong Baselines for Classification of Czech News Texts (arXiv 2307.10666)
- BenCzechMark: A Czech-centric Multitask and Multimetric Benchmark for Large Language Models (arXiv 2412.17933)
- How Can We Synthesize High-Quality Pretraining Data? (arXiv 2604.13977)