Location: Barcelona, Madrid, Zaragoza, San Sebastian (on-site with some flexibility)

We are partnering with a well-funded, rapidly scaling deep-tech company operating at the intersection of advanced AI and next-generation computing to find their next Senior LLM Engineers & Researchers. Their team combines world‑class researchers and engineers working on cutting‑edge challenges in large‑scale LLM model development, optimization, and deployment. This is an opportunity to join a highly technical environment where you will directly contribute to the future of large language models - not just apply them.

As a Senior LLM Engineer or Researcher, you will design, train, and optimize large-scale transformer models, contributing across pretraining, post‑training alignment (SFT, RLHF, DPO), evaluation, and inference optimization. This is a deeply technical role focused on core model development rather than downstream application or prompt engineering.

Key Responsibi...