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Senior ML Engineer (AI Research)

Spain💼 Full-time🗓 2026-09-18 → 2026-09-25

Core

Senior ML Engineer focused on applied AI research, developing advanced intelligent systems including reinforcement learning, agentic systems, and reasoning models.

Role type

Senior IC machine learning engineer (AI research)

Builds

Large-scale AI models and research prototypes for practical applications

Domain

Artificial Intelligence, Machine Learning, Reinforcement Learning, Large Language Models

Deliverable

production ML models

Required skills

Reinforcement learning, Large language models, Model distillation, Guided search, Distributed training, Python, JAX, Statistical rigor, Experimental design, Technical documentation

Preferred skills

Deep reinforcement learning for LLMs, RoPE, ZeRO/FSDP, Flash Attention, Quantization, Open-source contributions, Large-scale distributed data processing

Technologies

Python, JAX, CI/CD, Version control

Responsibilities

Conduct applied machine learning research in guided search, reinforcement learning, and agentic systems; Design and execute experiments for training large language models; Develop efficient methods for incorporating large-scale data into post-training workflows; Train large-scale machine learning models across multiple computational nodes; Translate promising research findings into practical solutions; Contribute to technical publications and research reports.

Seniority

Senior, hands-on IC

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