The Language, Computation, and Cognition Lab (LaCoCo) https://lacoco-lab.github.io/home/ at Saarland Informatics Campus (Saarbrücken, Germany), directed by Michael Hahn https://mhahn.info/, invites applications for fully funded PhD and postdoc positions, with a flexible start date.

* RESEARCH AREAS * We’re especially excited about projects on:

* Architectural limitations of large language models (LLMs), especially from theoretical perspectives * New architectures and efficient reasoning for LLMs * Mechanistic interpretability * Theoretical foundations for AI safety

You’ll have substantial freedom to shape your topic within the lab’s scope.

*ABOUT THE LAB*

The lab is generously supported by an Emmy Noether grant (DFG) and has substantial GPU resources. We regularly publish at top venues (e.g., six NeurIPS/ICML/ICLR papers in 2024–2025; ACL Best Paper 2024) and are embedded in a world-class environment: Saarland University (Departments of Computer Science and Language Science & Technology) https://saarland-informatics-campus.de/en/, MPI for Informatics https://www.mpi-inf.mpg.de/home, MPI-SWS https://www.mpi-sws.org/, CISPA https://cispa.de/en, and DFKI https://www.dfki.de/en/web.

Learn more about the lab at https://lacoco-lab.github.io/ https://lacoco-lab.github.io/https://lacoco-lab.github.io/

*HOW TO APPLY * Please follow the procedure here: https://lacoco-lab.github.io/joining/ https://lacoco-lab.github.io/joining/https://lacoco-lab.github.io/joining/

Deadline: December 20, 2025.

For questions, please contact Michael Hahn, mhahn@lst.uni-saarland.de

Applicants are expected to have a Master's degree by the start date. Applicants who only have an undergraduate degree should instead apply to the Saarbrücken Graduate School of Computer Science https://www.graduateschool-computerscience.de/.

-- Michael Hahn Assistant Professor Saarland Informatics Campus Saarland University Group: https://lacoco-lab.github.io/ Personal: https://www.mhahn.info/