Oskar Hallström
Paris, Ile-de-France
Summary
🤩
Rockstar🎓
Top SchoolOskar Hallström is an AI research scientist with ~5 years of hands-on experience building and adapting large language and vision models for enterprise deployment, currently advancing reinforcement learning workflows at Adaptive ML. He previously led Training and Inference at LightOn, shipping efficient VLM/LLM adaptations, large-scale pretraining (ModernBERT with 20M+ downloads) and one of the first open RLHF efforts (Alfred-40B) using PPO and custom context-extension techniques. Comfortable across distributed training at supercomputer and multi-node GPU scale, he combines research rigour from Linköping’s Reasoning & Learning Lab with production-focused optimization for customer GPU setups. Multilingual and internationally trained (EPFL exchange, Bocconi and Montréal programs), he pairs deep technical chops in reward modeling, triton/PyTorch kernel work and 3D parallelism with a knack for translating research into enterprise-ready solutions.
5 years of coding experience
2 years of employment as a software developer
Finance Summer Program, Finance Summer Program at Università BocconiFrench Immersion Summer Program, French Immersion Summer Program at Université de MontréalM Sc in Computer Science / Industrial Engineering and Management - International (French), M Sc in Computer Science / Industrial Engineering and Management - International (French) at Linköping UniversityNatural Science, Natural Science at The Viktor Rydberg Schools FoundationFull year exchange at the School of Computer and Communication Sciences Datavetenskap, Full year exchange at the School of Computer and Communication Sciences Datavetenskap at EPFL
Swedish, English, French
Github Skills (10)
bert10
natural-language-processing9
llm9
nlp9
deep-learning3
machine-learning3
pytorch3
streaming3
neural-network2
data-streaming1
Programming languages (1)
Github contributions (5)
ohallstrom/ohallstrom
May 2021 - Feb 2025
Contributions:30 pushes, 1 branch in 3 years 9 months
ohallstrom/Spotify-ML-Playlist-Creator
Oct 2021 - Mar 2025
Contributions:4 pushes in 3 years 6 months
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