Senior Machine Learning Engineer

Are you passionate about building impactful AI solutions and pushing the boundaries of machine learning? Do you want your work to deliver real-world value across critical national infrastructure?

We are seeking a Senior Machine Learning Engineer to join a leading technology and digital intelligence organisation in the UK. In this role, you will design, develop, and deploy machine learning and generative AI solutions that address complex challenges in the national security space.

What You’ll Do

• Design, develop, and iterate ML models for traditional tasks (forecasting, classification, anomaly detection) and GenAI/LLM applications.
• Lead experimentation cycles: define hypotheses, design experiments, evaluate results, and iterate rapidly.
• Transition validated experiments into production-ready solutions, collaborating with engineers and stakeholders.
• Build and optimise ML pipelines using AWS services and experiment tracking tools.
• Implement robust experiment tracking, model versioning, and reproducibility practices.
• Support production models through monitoring, performance analysis, and continuous improvement.
• Apply responsible AI practices, including model explainability and fairness assessment.
• Mentor junior colleagues and share learnings across the team.

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