CareerPlan

Machine Learning Engineer (Mid-Level)

Barcelona, ESFull-time2026-11-06 → 2026-11-09
HybridVisa sponsorship offered

Core

Build and maintain training, data, and evaluation pipelines for large language models (LLMs) and transformer architectures, optimizing performance for research and deployment.

Role type

Mid-level Machine Learning Engineer (LLM/Transformer focus)

Builds

Multi-node training pipelines, data curation/filtering pipelines, evaluation benchmarks, RL environments, and optimized model deployments.

Domain

Deep Tech / AI / Large Language Models / Quantum Software

Deliverable

production ML models

Required skills

Python, PyTorch, Transformer models, Distributed training (FSDP/DeepSpeed), Linux, Docker, Data pipelines, ML fundamentals

Preferred skills

Megatron-LM/NeMo, Post-training (SFT/DPO/RL), Inference engines (vLLM/TensorRT), Model compression, GPU profiling, MLOps, Spanish

Technologies

Megatron-LM, NeMo, PyTorch, Docker, Kubernetes, Slurm, vLLM, TensorRT-LLM, AWS, MLflow, Isaac Sim

Responsibilities

Build multi-node training and post-training pipelines; Build scalable data pipelines for curation and synthetic data; Build and maintain evaluation pipelines; Build RL environments and reward pipelines; Profile and optimize training/inference on GPU; Package and benchmark models for deployment; Turn research ideas into reusable code; Maintain reproducibility via containers and CI.

Seniority

Mid-level, hands-on IC