Job Title AI Agent & Tool-Use Engineer (RE2)Closing Date Thursday, 22 October, ****About BSC The Barcelona Supercomputing Center
- Centro Nacional de Supercomputación (BSC-CNS) is the leading supercomputing center in Spain. The mission of BSC is to research, develop and manage information technologies in order to facilitate scientific progress. BSC combines HPC service provision and R&D; into both computer and computational science (life, earth and engineering sciences) under one roof, and currently has over ***
* staff from 60 countries.
Look At The BSC Experience BSC-CNS YouTube ChannelLet's stay connected with BSC Folks We are particularly interested for this role in the strengths and lived experiences of women and underrepresented groups to help us avoid perpetuating biases and oversights in science and IT research. Context And Mission The Language Modeling Team at the AI Institute hosted at BSC has consolidated experience across several core NLP and AI areas, including massive language model training, fine-tuning, post-training alignment, domain adaptation, AI agent development and unsupervised learning, including low-resource languages. It has been entrusted by the Spanish and Catalan governments with the mission to develop foundational open-source resources and technologies for Spanish, Catalan and other co-official languages. The researcher will be responsible for designing and implementing innovative techniques for language modeling, evaluation and system adaptation tailored to high-performance computing systems.




Key Duties Implement and test agentic workflows including multi-step reasoning and tool-use capabilities under the supervision of the senior architect.
Execute post-training experiments using TRL, FastChat, and NeMo-RL to improve the agentic performance of small and large models.
Collaborate with the data team to curate high-quality instruction datasets for task-oriented dialogue and function execution.
Essential Knowledge and Professional Experience Solid experience in Fine-tuning and Post-training of Large Language Models.
Practical experience with Agentic AI patterns such as ReAct or autonomous tool-use.
Proficiency in Python and Deep Learning libraries like PyTorch.
Hands-on experience with modern post-training frameworks including TRL, FastChat, or NeMo-RL.
Excellent level of written and spoken English.
Fluency in Spanish is highly valued.
Conditions The position will be located at BSC within the Directors DepartmentWe offer a full-time contract (35h/week), a good working environment, a highly stimulating environment with state-of-the-art infrastructure, adaptable

working hours
, extensive training plan, restaurant tickets, private health insurance, support to the relocation proceduresDuration: Open-ended contract due to technical and scientific activities linked to the project and budget durationHolidays: 22 days of holidays + 6 personal days + 24th and 31st of December per our collective agreementSalary:

we offer
a competitive salary commensurate with the qualifications and experience of the candidate and according to the cost of living in BarcelonaStarting date: ASAP#J-*-Ljbffr

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