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Fredrik Johansson

@frejohk.bsky.social
152 followers 288 following 22 posts

Associate professor, Chalmers University of Technology. Machine learning for decision making & healthcare. healthyai.se, fredjo.com

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Fredrik Johansson @frejohk.bsky.social · 31/03/2026
I'm hiring a post-doc for the Healthy AI Lab 📣. Come join us to work on machine learning methods to improve decision-making, e.g., in health applications. If you can't stop thinking about research problems until you make progress, you may be the right fit! www.chalmers.se/en/about-cha...
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Reposted by Fredrik Johansson
Rocío Mercado Oropeza @rociomer.bsky.social · 28/10/2025
Great first day of the 3rd annual CHAIR Structured Learning Workshop @ Chalmers! 🥳 Event page & agenda: ui.ungpd.com/Events/60bfc... 1st day featuring: @betapata.bsky.social @janstuehmer.bsky.social @arnauddoucet.bsky.social @frejohk.bsky.social
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Fredrik Johansson @frejohk.bsky.social · 21/10/2025
🚨 Preprint on LLMs in external environments: Zhongqi (Nick) Yue, a great post-doc in my lab, has led the development of EARL—a new reinforcement learning framework for LLMs to interact with external environments, greatly improving over text-only interaction in reasoning tasks.
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Fredrik Johansson @frejohk.bsky.social · 13/10/2025
Last Friday, Newton Mwai Kinyanjui defended his PhD thesis "Leveraging Structural Priors and Historical Data for Practical Treatment Personalization with Multi-Armed Bandits". It's been a pleasure having you in the lab, Newton! Looking forward to seeing what the next chapter brings!
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Fredrik Johansson @frejohk.bsky.social · 13/10/2025
Last Friday, Newton Mwai Kinyanjui defended his PhD thesis "Leveraging Structural Priors and Historical Data for Practical Treatment Personalization with Multi-Armed Bandits". It's been a pleasure having you in the lab, Newton! Looking forward to seeing the next chapter!
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Reposted by Fredrik Johansson
NeurIPS Europe @neuripseurope.bsky.social · 12/09/2025
We are delighted to announce the #EurIPS 2025 Workshops 🎉: eurips.cc/workshops/ We received 52 proposals, which were single-blind reviewed by more than 35 expert reviewers, leading to 18 accepted workshops (acceptance rate 34.6%).
eurips.cc
Workshops - A NeurIPS-endorsed conference in Europe
A NeurIPS-endorsed conference in Europe held in Copenhagen, Denmark
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Fredrik Johansson @frejohk.bsky.social · 29/08/2025
This week has been an absolute joy for me as the leader of the Healthy AI Lab! Two of my students, Anton Matsson (3rd from right) and Lena Stempfle (2nd from right), defended their theses and became the first PhD graduates under my supervision 🎉 You will both be sorely missed!
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Fredrik Johansson @frejohk.bsky.social · 09/07/2025
Going to ICML next week? Find Anton and talk to him about our work on prediction models that learn to avoid missing values!
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Fredrik Johansson @frejohk.bsky.social · 08/05/2025
I'm thrilled to share that Lena Stempfle's, Anton Matsson's and Newton Mwai's paper "Prediction models that learn to avoid missing values" was accepted to ICML and awarded a spotlight! Arxiv here: arxiv.org/abs/2505.03393 More below👇
arxiv.org
Prediction Models That Learn to Avoid Missing Values
Handling missing values at test time is challenging for machine learning models, especially when aiming for both high accuracy and interpretability. Established approaches often add bias through imput...
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Fredrik Johansson @frejohk.bsky.social · 05/05/2025
10 days to go to apply for this PhD student position in my lab!
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Fredrik Johansson @frejohk.bsky.social · 23/04/2025
Last but not least: The student will be co-advised by the fantastic @urish.bsky.social!
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Fredrik Johansson @frejohk.bsky.social · 23/04/2025
We are hiring a *PhD student* in my group to work on machine learning generalization "out-of-table". Help build methods that learn from large volumes of tabular data to generate models for new tasks! Apply here: www.chalmers.se/en/about-cha...
chalmers.se
Vacancies
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Reposted by Fredrik Johansson
Ratvader @ratvaderr.bsky.social · 10/12/2024
Open for work! Unfortunately, I just found out that all funding and grants for my 2025 projects are canceled. Would love the opportunity to continue the musical journey started with #Ultros. Comfortable with #GameMusic #GameAudio. Retweets appreciated linktr.ee/ratvader
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Fredrik Johansson @frejohk.bsky.social · 10/12/2024
I'm currently at NeurIPS eager to talk about the two papers from my group: * Active Preference Learning for Ordering Items In-and Out-of-sample (arxiv.org/abs/2405.03059) * IncomeSCM: From tabular data set to time-series simulator and causal estimation benchmark (arxiv.org/abs/2405.16069)
arxiv.org
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Reposted by Fredrik Johansson
Andreas Krause @arkrause.bsky.social · 20/11/2024
📣 We have a tenure-track faculty opening in Responsible AI at @ethzurich.bsky.social : ethz.ch/en/the-eth-z.... Deadline Nov 30 for full consideration. ETH Zurich is a vibrant environment for AI research with the ETH AI Center etc. Please help spread the word!
ethz.ch
Assistant Professor (Tenure Track) of Computer Science – Responsible Artificial Intelligence
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