Principal Machine Learning Engineer Barcelona, Spain (Hybrid) | Up to €135,000 Base + Bonus (c.€This is an opportunity to join a growing, profitable AI-driven technology business where machine learning is central to the product and commercial strategy. The role offers a rare blend of technical leadership and hands-on engineering, allowing you to shape the future direction of ML systems while solving complex challenges at scale. They are an established technology scale-up that develops advanced machine learning solutions to power highly personalised digital experiences for millions of users worldwide.

Operating internationally, the business has grown significantly in recent years and continues to invest heavily in its data and AI capabilities. Their machine learning teams work on large-scale real-time systems where model performance directly impacts commercial outcomes. With a collaborative engineering culture and strong leadership support, they offer an environment where innovation and experimentation are encouraged.





Driving best practice across MLOps, model monitoring, observability and automated retraining. Enhancing machine learning infrastructure, experimentation platforms and deployment processes. Partnering with engineering leaders and business stakeholders to align machine learning initiatives with commercial objectives.

Strong commercial experience building and owning machine learning systems in production.

Advanced

Python skills alongside experience with modern machine learning frameworks such as PyTorch or TensorFlow. Strong software engineering fundamentals with a focus on scalability, performance and reliability. PhD in a STEM discipline. Exposure to mobile advertising, attribution modelling or related performance marketing technologies. Versátil remote working policy. ~ Technical interview and assessment review with senior machine learning engineers. #

📌 Senior Engineering Manager (Remote) (Barcelona)
🏢 Harnham
📍 Barcelona