Senior Llm Engineer (Barcelona)

Senior LLM Engineers & Researchers

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...