Senior ML Research Scientist – Hybrid Cardiff, Real-World AI

The Opportunity Hub UK Ltd; Cardiff; Hybrid; GBP 60,000 - 95,000; Full time

Benefits offered by this job

Salary range

Hybrid Cardiff

Private medical + pension

Flexible annual leave

Career progression

Job summary

The Opportunity Hub UK Ltd in Cardiff is seeking a Senior Machine Learning Research Scientist to shape AI technology and production systems. You will sit where theory meets shipped products, guiding experimentation and decision-making across the team.

You’ll mentor junior researchers, design robust pipelines, and present findings to both technical and non-technical stakeholders while influencing technical direction.

Qualifications

• A strong track record in machine learning research, ideally with published work or shipped models to point to.
• Fluency in Python and at least one major deep learning framework (PyTorch or TensorFlow).
• Solid grounding in statistics and experimental design to assess real results.
• Experience taking a model from notebook to production, including the unglamorous parts.
• The judgement to say 'this won't work' early, with clear explanations.

Responsibilities

• Design and run experiments that test new model architectures against real business problems.
• Turn promising research ideas into production-ready systems, working closely with engineering.
• Read and critically assess new papers, then decide which ideas are worth pursuing.
• Build and maintain training pipelines, evaluation frameworks, and datasets that hold up under scrutiny.
• Present findings to technical and non-technical stakeholders, including limitations.
• Mentor junior researchers and engineers on method, not just output.

Skills

Machine learning research

Python

Production-ready ML

Mentoring

Communication

Tools

PyTorch

TensorFlow

Job description

The Opportunity Hub UK Ltd in Cardiff is seeking a Senior Machine Learning Research Scientist to shape AI technology and production systems. You will sit where theory meets shipped products, guiding experimentation and decision-making across the team.

You’ll mentor junior researchers, design robust pipelines, and present findings to both technical and non-technical stakeholders while influencing technical direction.