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Research engineer - nlp & large language models

Lausanne
EPFL
Model
EUR 80’000 pro Jahr
Inserat online seit: 18 Februar
Beschreibung

About The Role

We are seeking a Research Engineer in Natural Language Processing (NLP) and Large Language Models (LLMs) to contribute to the design, training, and evaluation of next-generation foundation models. The role sits at the intersection of research and production‑grade engineering, with a strong emphasis on post‑training, multimodality, and advanced generative modeling techniques, including diffusion‑based approaches. You will work closely with researchers and applied scientists to translate novel ideas into scalable, reproducible systems, and to push the state of the art in open, responsible, and multilingual AI.


Key Responsibilities

* Design, implement, and maintain training and post‑training pipelines for large language and multimodal models (e.g., instruction tuning, alignment, preference optimization)
* Conduct research and engineering on post‑training methods
* Contribute to multimodal modeling, integrating text with modalities such as vision, speech, or audio
* Explore and apply diffusion‑based models and hybrid generative approaches for language and multimodal representation learning
* Optimize large‑scale training and inference
* Develop evaluation pipelines and benchmarks for language understanding, reasoning, alignment, and multimodal performance
* Collaborate with researchers to prototype new ideas, reproduce results from the literature, and contribute to publications or technical reports
* Ensure code quality, reproducibility, and documentation suitable for long‑term research and open‑source release


Required Qualifications

* MSc or PhD in Computer Science, Machine Learning, AI, or a related field (or equivalent practical experience)
* Strong background in NLP and deep learning, with hands‑on experience working with large language models
* Solid programming skills in Python, with experience using modern ML frameworks (e.g., PyTorch)
* Experience working with open‑weight or open‑data models, including releasing models, datasets, or benchmarks
* Familiarity with post‑training techniques for LLMs (e.g., instruction tuning, preference optimization, alignment)
* Strong experimental rigor: ability to design controlled experiments, analyze results, and iterate efficiently


Desired / Bonus Qualifications

* Experience with diffusion models (e.g., text diffusion, latent diffusion, or multimodal diffusion)
* Hands‑on work on multimodal models (e.g., text‑image, text‑audio, speech‑language systems)
* Exposure to LLM alignment, safety, or evaluation beyond standard language modeling metrics
* Experience with distributed training and large‑scale model experimentation
* Familiarity with multilingual or low‑resource language settings
* Contributions to open‑source ML or published research in NLP, multimodality, or generative modeling


What We Offer

* A research-driven environment with access to large‑scale compute and modern ML infrastructure
* Close collaboration with leading researchers in NLP, multimodality, and generative modeling
* The opportunity to work on foundational, open, and socially responsible AI systems
* Support for publishing research, contributing to open‑source projects, and engaging with the broader research community
* Competitive compensation and benefits, commensurate with experience


Information

* Contract Start Date: to be agreed upon
* Activity Rate: 100%
* Duration: 1 year, renewable
* Contract Type: Fixed‑term contract (CDD)
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