Senior ML Engineer - Real-Time AI Security & Detection

Refractal Ltd in London is seeking a seasoned ML Engineer to own the production models behind detections and the analyses that show performance for each customer. You will train, tune and ship classifiers for prompt injection, data exfiltration and other risky AI activity, and design low-latency models.

The role emphasizes evaluating drift, false positives and latency, building benchmarks, and turning policies into measurable controls.