Staff Machine Learning Engineer | Barcelona | AI & Data Consultancy

Are you a seasoned ML engineer ready to move beyond execution and into true technical leadership?

We’re working with a leading AI & Data consultancy that partners with enterprise clients on large-scale AI transformations. They’re looking for a Staff Machine Learning Engineer based in Barcelona to own their most complex, high-impact projects — from architecture design through to production deployment.

The role

This goes beyond building models. You’ll set technical direction, mentor engineers, and shape how ML is delivered at scale — while staying hands-on with high-quality code contributions.

• Set direction for a technical team, ensuring architectural excellence and long-term maintainability
• Lead and mentor junior and senior engineers, raising the technical bar across projects
• Design and deploy LLM-based applications, including RAG systems, prompt engineering, and vector databases
• Partner directly with enterprise clients to translate business challenges into clear technical roadmaps
• Drive adoption of modern ML best practices across modelling, MLOps, and system design

What you’ll bring

• 6–8 years of experience in machine learning, data science, or a related field
• Strong Python skills and proficiency in ML/DL frameworks (PyTorch, TensorFlow, Scikit-learn)
• Deep learning experience (CNNs, RNNs) and solid knowledge of clustering, regression, and classification
• Hands-on experience deploying LLM applications and RAG pipelines in production
• Cloud platform experience — AzureML, AWS, or GCP
• Experience with Databricks, Snowflake, or Dataiku (certifications a plus)
• A track record of technical leadership and mentoring engineering teams
• Fluent Spanish/English

Why this role?

• Staff-level scope with real influence over technical strategy — not just execution
• Work on cutting-edge AI projects across diverse enterprise clients
• A collaborative, high-calibre team that values engineering excellence
• Based in Barcelona

Interested or know someone who’d be a great fit? Apply directly or send me a message — all enquiries handled confidentially.